HR job title
- Retired Professor
- Contact Info
- 1 979 862 3967
- Websites
Childs, Dara Professor
Positions
- Professor, Mechanical Engineering, College of Engineering
- Faculty Affiliate, Energy Institute, Texas A&M Engineering Experiment Station (TEES)
Dr. Dara W. Childs, P.E. was Director of the Turbomachinery Laboratory from 1984 to 2018 and held the Leland T. Jordan Chair in Mechanical Engineering at Texas A&M University. He received B.S. and M.S. degrees (Civil Engineering, 1961, 1962) from Oklahoma State University, and his Ph.D. (Engineering Mechanics, 1968) from the University of Texas. He was named ASME Fellow Member in 1990 and received ASMEs Henry R. Worthington Medal in 1991. Dr. Childs' expertise is in dynamics and vibrations, with an emphasis in rotordynamics. He has conducted research and engineering projects for NASA, DOD, and private firms. Current research includes high-pressure testing honeycomb and hole-pattern gas damper seals; testing high-pressure laminar oil seals; force measurements in magnetic bearings using fiber-optic strain gauges. Dr. Childs has authored numerous reviewed publications related to rotordynamics and vibrations, and the book, Turbomachinery Rotordynamics. He is presently completing a new dynamics book entitled, Dynamics in Engineering Practice.
Research Areas
- Overview
- Publications
- Teaching
- Works By Students
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Overview
Publications
selected publications
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academic article
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Zhang, M., Childs, D. W., Tran, D. L., & Shresth, H.
(2020).
Effects of Clearance on the Performance of a Labyrinth Seal Under Wet-Gas Conditions. Journal of Engineering for Gas Turbines and Power.
142(11),
-
Childs, D. W.
(2020).
Discussion of "Non-Axisymmetric Flows and Rotordynamic Forces in an Eccentric Shrouded Centrifugal Compressor-Part 1: Measurement" (Song, J., Kim, S., Park, T. C., Cha, B.-J., Lim, D. H., Hong, J. S., Lee, T. W., and Song, S. J., ASME J. Eng. Gas Turbines Power, 141(11), p. 111014). Journal of Engineering for Gas Turbines and Power.
142(10),
-
Childs, D. W.
(2020).
Discussion of "Non-Axisymmetric Flows and Rotordynamic Forces in an Eccentric Shrouded Centrifugal Compressor-Part 2: Analysis" (Song, J., and Song S. J., ASME J. Eng. Gas Turbines Power, 141(11), p. 111015). Journal of Engineering for Gas Turbines and Power.
142(10),
-
Tran, D. L., Childs, D. W., Shrestha, H., & Zhang, M.
(2020).
Preswirl and Mixed-Flow (Mainly Liquid) Effects on Rotordynamic Performance of a Long (L/D=0.75) Smooth Seal. Journal of Engineering for Gas Turbines and Power.
142(3),
-
Zhang, M., & Childs, D. W.
(2020).
A Study for Rotordynamic and Leakage Characteristics of a Long-Honeycomb Seal With Two-Phase, Mainly Air Mixtures. Journal of Engineering for Gas Turbines and Power.
142(1),
-
Zhang, M., Childs, D. W., Tran, D. L., & Shrestha, H.
(2020).
A Study on the Leakage and Rotordynamic Coefficients of a Long-Smooth Seal With Laminar-Two-Phase, Mainly-Oil Mixtures. Journal of Engineering for Gas Turbines and Power.
142(1),
-
Zhang, M., & Childs, D. W.
(2019).
A Study on the Leakage and Rotordynamic Performance of a Long Labyrinth Seal Under Mainly Air Conditions. Journal of Engineering for Gas Turbines and Power.
141(12),
-
Shrestha, H., Childs, D. W., Tran, D. L., & Zhang, M.
(2019).
Experimental Study of the Static and Dynamic Characteristics of a Long (L/D=0.75) Labyrinth Annular Seal Operating Under Two-Phase (Liquid/Gas) Conditions. Journal of Engineering for Gas Turbines and Power.
141(11),
-
Childs, D. W., & Esser, P.
(2019).
Measurements Versus Predictions for a Hybrid (Hydrostatic Plus Hydrodynamic) Thrust Bearing for a Range of Orifice Diameters. Journal of Engineering for Gas Turbines and Power.
141(6),
-
Zhang, M., Childs, D. W., Tran, D. L., & Shrestha, H.
(2019).
Clearance Effects on Rotordynamic Performance of a Long Smooth Seal With Two-Phase, Mainly-Air Mixtures. Journal of Engineering for Gas Turbines and Power.
141(1),
-
Moreland, J. A., Childs, D. W., & Bullock, J. T.
(2018).
Measured Static and Rotordynamic Characteristics of a Smooth-Stator/Grooved-Rotor Liquid Annular Seal. Journal of Fluids Engineering, Transactions of the ASME.
140(10),
-
Norrbin, C. S., & Childs, D. W.
(2018).
Lateral Equilibrium Position Analysis Program With Applications to Electric Submersible Pumps. Journal of Engineering for Gas Turbines and Power.
140(6),
-
Zhang, M., Mclean, J., & Childs, D. W.
(2017).
Experimental Study of the Static and Dynamic Characteristics of a Long Smooth Seal With Two-Phase, Mainly Air Mixtures. Journal of Engineering for Gas Turbines and Power.
139(12), 122504.
-
Norrbin, C. S., Childs, D. W., & Phillips, S.
(2017).
Including Housing-Casing Fluid in a Lateral Rotordynamics Analysis on Electric Submersible Pumps. Journal of Engineering for Gas Turbines and Power.
139(6),
-
Kilgore, J. J., & Childs, D. W.
(2017).
Rotordynamic coefficients and leakage flow of circumferentially-grooved liquid-seals. 81 ), 195-203.
-
Gaines, J. E., & Childs, D. W.
(2016).
The Impact of Pad Flexibility on the Rotordynamic Coefficients of Tilting-Pad Journal Bearings. Journal of Engineering for Gas Turbines and Power.
138(8), 082501.
-
Childs, D. W., Mclean, J., Zhang, M., & Arthur, S. P.
(2016).
Rotordynamic Performance of a Negative-Swirl Brake for a Tooth-on-Stator Labyrinth Seal. Journal of Engineering for Gas Turbines and Power.
138(6), 062505.
-
Muhammed, A., & Childs, D. W.
(2016).
Vibration Modeling and Experimental Results of Two-Phase Twin-Screw Pump. Journal of Engineering for Gas Turbines and Power.
138(9),
-
Muhammed, A., & Childs, D. W.
(2015).
VIBRATION MODELING AND EXPERIMENTAL RESULTS OF TWO PHASE TWIN-SCREW PUMP. 138(9), 092601.
-
Tschoepe, D. P., & Childs, D. W.
(2014).
Measurements Versus Predictions for the Static and Dynamic Characteristics of a Four-Pad, Rocker-Pivot, Tilting-Pad Journal Bearing. 136(5), 052501.
-
Childs, D. W., & Muhammed, A.
(2014).
Comments on a Newly-Identified Destabilizing Rotordynamic Mechanism Arising in Vertical Hydraulic Turbines and the Back Shrouds of Centrifugal Impellers. Journal of Engineering for Gas Turbines and Power.
136(4), 042502.
-
Childs, D. W., Arthur, S., & Mehta, N. J.
(2014).
The Impact of Hole Depth on the Rotordynamic and Leakage Characteristics of Hole-Pattern-Stator Gas Annular Seals. Journal of Engineering for Gas Turbines and Power.
136(4), 042501.
-
Vannarsdall, M., & Childs, D. W.
(2014).
Static and Rotordynamic Characteristics for a New Hole-Pattern Annular Gas Seal Design Incorporating Larger Diameter Holes. Journal of Engineering for Gas Turbines and Power.
136(2), 022507.
-
Mehta, N. J., & Childs, D. W.
(2014).
Measured Comparison of Leakage and Rotordynamic Characteristics for a Slanted-Tooth and a Straight-Tooth Labyrinth Seal. 136(1), 012501.
-
Avendano, R. D., & Childs, D. W.
(2013).
One Explanation for Two-Times Running Speed Response Due to Misalignment in Rotors Connected by Flexible Couplings. Journal of Engineering for Gas Turbines and Power.
135(6), 062501.
-
Muhammed, A., & Childs, D. W.
(2013).
Rotordynamics of a Two-Phase Flow Twin Screw Pump. Journal of Engineering for Gas Turbines and Power.
135(6), 062502.
-
Wilkes, J. C., & Childs, D. W.
(2013).
Improving Tilting Pad Journal Bearing Predictions-Part I: Model Development and Impact of Rotor Excited Versus Bearing Excited Impedance Coefficients. 135(1), 012502.
-
Wilkes, J. C., & Childs, D. W.
(2013).
Improving Tilting-Pad Journal Bearing Predictions-Part II: Comparison of Measured and Predicted Rotor-Pad Transfer Functions for a Rocker-Pivot Tilting-Pad Journal Bearing. 135(1), 012503.
-
Brown, P. D., & Childs, D. W.
(2012).
Measurement Versus Predictions of Rotordynamic Coefficients of a Hole-Pattern Gas Seal With Negative Preswirl. Journal of Engineering for Gas Turbines and Power.
134(12), 122503.
-
Wilkes, J. C., & Childs, D. W.
(2012).
Tilting Pad Journal Bearings-A Discussion on Stability Calculation, Frequency Dependence, and Pad and Pivot. Journal of Engineering for Gas Turbines and Power.
134(12), 122508.
-
Childs, D. W., & Saha, R.
(2012).
A New, Iterative, Synchronous-Response Algorithm for Analyzing the Morton Effect. Journal of Engineering for Gas Turbines and Power.
134(7), 072501.
-
Childs, D. W., & Kumar, D.
(2012).
Dry-Friction Whip and Whirl Predictions for a Rotor-Stator Model With Rubbing Contact at Two Locations. Journal of Engineering for Gas Turbines and Power.
134(7), 072502.
-
Kulhanek, C. D., & Childs, D. W.
(2012).
Measured Static and Rotordynamic Coefficient Results for a Rocker-Pivot, Tilting-Pad Bearing With 50 and 60% Offsets. Journal of Engineering for Gas Turbines and Power.
134(5), 052505.
-
Childs, D. W., Kheireddin, B., Phillips, S., & Asirvatham, T. D.
(2011).
Friction Factor Behavior From Flat-Plate Tests of Smooth and Hole-Pattern Roughened Surfaces With Supply Pressures up to 84 bars. 133(9), 092504.
-
Childs, D. W., & Carter, C. R.
(2011).
Rotordynamic Characteristics of a Five Pad, Rocker-Pivot, Tilting Pad Bearing in a Load-on-Pad Configuration; Comparisons to Predictions and Load-Between-Pad Results. 133(8), 082503.
-
Gupta, M. K., & Childs, D. W.
(2010).
Rotordynamic Stability Predictions for Centrifugal Compressors Using a Bulk-Flow Model to Predict Impeller Shroud Force and Moment Coefficients. 132(9), 091402.
-
Thorat, M. R., & Childs, D. W.
(2010).
Predicted Rotordynamic Behavior of a Labyrinth Seal as Rotor Surface Speed Approaches Mach 1. Journal of Engineering for Gas Turbines and Power.
132(11), 112504.
-
Childs, D., & Harris, J.
(2009).
Static Performance Characteristics and Rotordynamic Coefficients for a Four-Pad Ball-in-Socket Tilting Pad Journal Bearing. Journal of Engineering for Gas Turbines and Power.
131(6), 062502.
-
Carter, C. R., & Childs, D. W.
(2009).
Measurements Versus Predictions for the Rotordynamic Characteristics of a Five-Pad Rocker-Pivot Tilting-Pad Bearing in Load-Between-Pad Configuration. Journal of Engineering for Gas Turbines and Power.
131(1), 012507.
-
Al-Jughaiman, B., & Childs, D.
(2008).
Static and Dynamic Characteristics for a Pressure-Dam Bearing. Journal of Engineering for Gas Turbines and Power.
130(5), 052501.
-
Shin, Y., & Childs, D. W.
(2008).
The impact of real gas properties on predictions of static and rotordynamic properties of the annular gas seals for injection compressors. 130(4), 042504.
-
Zutavern, Z. S., & Childs, D. W.
(2008).
Identification of rotordynamic forces in a flexible rotor system using magnetic bearings. Journal of Engineering for Gas Turbines and Power.
130(2), 022504.
-
Gupta, M. K., Soulas, T. A., & Childs, D. W.
(2008).
New steps to improve rotordynamic stability predictions of centrifugal compressors. Journal of Engineering for Gas Turbines and Power.
130(2), 022505.
-
Childs, D. W., Shin, Y., & Seifert, B.
(2008).
A Design to Improve the Effective Damping Characteristics of Hole-Pattern-Stator Annular Gas Seals. Journal of Engineering for Gas Turbines and Power.
130(1), 012505.
-
Childs, D.
(2007).
Discussion: The Lomakin Effect in Annular Gas Seals Under Choked Flow Conditions (Arghir, M., Defaye, C., and Frne, F., 2007, ASME J. Eng. Gas Turbines Power, 129, pp. 10281034). 129(4), 1143-1143.
-
Childs, D. W., & Bhattacharya, A.
(2007).
Prediction of dry-friction whirl and whip between a rotor and a stator. Journal of Vibration and Acoustics: Transactions of the ASME.
129(3), 355-362.
-
Childs, D. W., Graviss, M., & Rodriguez, L. E.
(2007).
Influence of groove size on the static and rotordynamic characteristics of short, laminar-flow annular seals. 129(2), 398-406.
-
Sprowl, T. B., & Childs, D. W.
(2007).
A Study of the Effects of Inlet Preswirl on the Dynamic Coefficients of a Straight-Bore Honeycomb Gas Damper Seal. 129(1), 220-229.
-
Smalley, A. J., Camatti, M., Childs, D. W., Hollingsworth, J. R., Vannini, G., & Carter, J. J.
(2006).
Dynamic characteristics of the diverging taper honeycomb-stator seal. Journal of Turbomachinery.
128(4), 717-724.
-
Al-Ghasem, A. M., & Childs, D. W.
(2006).
Rotordynamic coefficients measurements versus predictions for a high-speed flexure-pivot tilting-pad bearing (load-between-pad configuration). 128(4), 896-906.
-
Rodriguez, L. E., & Childs, D. W.
(2006).
Frequency dependency of measured and predicted rotordynamic coefficients for a load-on-pad flexible-pivot tilting-pad bearing. 128(2), 388-395.
-
Childs, D. W., Rodriguez, L. E., Cullotta, V., Al-Ghasem, A., & Graviss, M.
(2006).
Rotordynamic-coefficients and static (equilibrium loci and leakage) characteristics laminar-flow for annular seals. Journal of Tribology.
128(2), 378-387.
-
Villasmil, L. A., Chen, H. C., & Childs, D. W.
(2005).
Evaluation of near-wall turbulence models for deliberately roughened liquid annular seals. AIAA Journal.
43(10), 2137-2146.
-
Picardo, A., & Childs, D. W.
(2005).
Rotordynamic coefficients for a tooth-on-stator labyrinth seal at 70 bar supply pressures: Measurements versus theory and comparisons to a hole-pattern stator seal. 127(4), 843-855.
-
Villasmil, L. A., Childs, D. W., & Chen, H. C.
(2005).
Understanding friction factor behavior in liquid annular seals with deliberately roughened surfaces. Journal of Tribology.
127(1), 213-222.
-
Childs, D. W., & Wade, J.
(2004).
Rotordynamic-Coefficient and Leakage Characteristics for Hole-Pattern-Stator Annular Gas SealsMeasurements Versus Predictions. Journal of Tribology.
126(2), 326-333.
-
Weatherwax, M., & Childs, D. W.
(2003).
Theory versus experiment for the rotordynamic characteristics of a high pressure honeycomb annular gas seal at eccentric positions. 125(2), 422-429.
-
Childs, D. W.
(2003).
Twice-running-speed response due to elliptical bearing clearances. Journal of Vibration and Acoustics: Transactions of the ASME.
125(1), 64-67.
-
Dawson, M. P., Childs, D. W., Holt, C. G., & Phillips, S. G.
(2002).
Measurements versus predictions for the dynamic impedance of annular gas seals - Part I: Test facility and apparatus. 124(4), 958-962.
-
Dawson, M. P., & Childs, D. W.
(2002).
Measurements versus predictions for the dynamic impedance of annular gas seals - Part II: Smooth and honeycomb geometries. 124(4), 963-970.
-
D'Souza, R. J., & Childs, D. W.
(2002).
A comparison of rotordynamic-coefficient predictions for annular honeycomb gas seals using three different friction-factor models. Journal of Tribology.
124(3), 524-529.
-
Laurant, F., & Childs, D. W.
(2002).
Measurements of rotordynamic coefficients of hybrid bearings with (a) a plugged orifice, (b) a worn land surface. Journal of Engineering for Gas Turbines and Power.
124(2), 363-368.
-
Holt, C. G., Childs, D., & Childs, D. W.
(2002).
Theory versus experiment for the rotordynamic impedances of two hole-pattern-stator gas annular seals. Journal of Tribology.
124(1), 137-143.
-
Childs, D. W.
(2001).
A note on Kellenberger's model for spiral vibrations. Journal of Vibration and Acoustics: Transactions of the ASME.
123(3), 405-408.
-
Nielsen, K. K., Childs, D. W., & Myllerup, C. M.
(2001).
Experimental and theoretical comparison of two swirl brake designs. 123(2), 353-358.
-
Lindsey, W. T., & Childs, D. W.
(2000).
The Effects of Converging and Diverging Axial Taper on the Rotordynamic Coefficients of Liquid Annular Pressure Seals: Theory Versus Experiment. 122(2), 126-131.
-
Laurant, F., & Childs, D. W.
(1999).
Rotordynamic evaluation of a near-tangential-injection hybrid bearing. Journal of Tribology.
121(4), 886-891.
-
Soto, E. A., & Childs, D. W.
(1999).
Experimental rotordynamic coefficient results for (a) a labyrinth seal with and without shunt injection and (b) a honeycomb seal. Journal of Engineering for Gas Turbines and Power.
121(1), 153-159.
-
Fayolle, P., & Childs, D. W.
(1999).
Rotordynamic evaluation of a roughened-land hybrid bearing. Journal of Tribology.
121(1), 133-138.
-
Childs, D. W., & Fayolle, P.
(1999).
Test results for liquid "damper" seals using a round-hole roughness pattern for the stators. Journal of Tribology.
121(1), 42-49.
-
Yu, Z., & Childs, D. W.
(1998).
A comparison of experimental rotordynamic coefficients and leakage characteristics between hole-pattern gas damper seals and a honeycomb seal. Journal of Engineering for Gas Turbines and Power.
120(4), 778-783.
-
Mosher, P., & Childs, D. W.
(1998).
Theory Versus Experiment for the Effects of Pressure Ratio on the Performance of an Orifice-Compensated Hybrid Bearing. Journal of Vibration and Acoustics: Transactions of the ASME.
120(4), 930-936.
-
Kleynhans, G. F., & Childs, D. W.
(1997).
The acoustic influence of cell depth on the rotordynamic characteristics of smooth-rotor/honeycomb-stator annular gas seals. Journal of Engineering for Gas Turbines and Power.
119(4), 949-956.
-
Childs, D.
(1997).
Case for industrially-sponsored university research. Turbomachinery International.
38(5), 30.
-
Marquette, O. R., Childs, D. W., & SanAndres, L.
(1997).
Eccentricity effects on the rotordynamic coefficients of plain annular seals: Theory versus experiment. Journal of Tribology.
119(3), 443-447.
-
San Andres, L., & Childs, D.
(1997).
Angled InjectionHydrostatic Bearings Analysis and Comparison to Test Results. Journal of Tribology.
119(1), 179-187.
-
Ha, T. W., & Childs, D. W.
(1996).
A rotordynamic analysis of an annular honeycomb seal using a two-control volume model. 10(3), 332-340.
-
Marquette, O. R., & Childs, D. W.
(1996).
An extended three-control-volume theory for circumferentially-grooved liquid seals. Journal of Tribology.
118(2), 276-285.
-
Childs, D. W., & Gansle, A. J.
(1996).
Experimental leakage and rotordynamic results for helically grooved annular gas seals. Journal of Engineering for Gas Turbines and Power.
118(2), 389-393.
-
Yang, Z., Andres, L. S., & Childs, D. W.
(1996).
Thermal effects in liquid oxygen hydrostatic journal bearings. Tribology Transactions.
39(3), 654-662.
-
SANANDRES, L., CHILDS, D., & YANG, Z.
(1995).
TURBULENT-FLOW HYDROSTATIC BEARINGS - ANALYSIS AND EXPERIMENTAL RESULTS. International Journal of Mechanical Sciences.
37(8), 815-829.
-
ALEXANDER, C. R., CHILDS, D. W., & YANG, Z.
(1995).
THEORY VERSUS EXPERIMENT FOR THE ROTORDYNAMIC CHARACTERISTICS OF A SMOOTH ANNULAR GAS SEAL AT ECCENTRIC POSITIONS. Journal of Tribology.
117(1), 148-152.
-
Franchek, N. M., Childs, D. W., & San Andres, L.
(1994).
Theoretical and experimental comparisons for rotordynamic coefficients of a high-speed, high-pressure, orifice-compensated hybrid bearing. American Society of Mechanical Engineers (Paper).
1-6.
-
Alexander, C. R., Childs, D. W., & Yang, Z.
(1994).
Theory versus experiment for the rotordynamic characteristics of a smooth annular gas seal at eccentric positions. American Society of Mechanical Engineers (Paper).
1-5.
-
Childs, D., & Hale, K.
(1994).
A Test Apparatus and Facility to Identify the Rotordynamic Coefficients of High-Speed Hydrostatic Bearings. Journal of Tribology.
116(2), 337-343.
-
HA, T. W., & CHILDS, D. W.
(1994).
ANNULAR HONEYCOMB-STATOR TURBULENT GAS SEAL ANALYSIS USING A NEW FRICTION-FACTOR MODEL-BASED ON FLAT-PLATE TESTS. Journal of Tribology.
116(2), 352-360.
-
YANG, Z., SANANDRES, L., & CHILDS, D. W.
(1994).
DYNAMIC FORCE PERFORMANCE OF ANNULAR GAS SEALS AT OFF-CENTER CONDITIONS. Tribology Transactions.
37(1), 33-42.
-
Zhou Yang, .., San Andres, L., & Childs, D. W.
(1994).
Dynamic force performance of annular gas seals at off-center conditions. Tribology Transactions.
37(1), 33-42.
-
FRANCHEK, N. M., & CHILDS, D. W.
(1994).
EXPERIMENTAL TEST-RESULTS FOR 4 HIGH-SPEED, HIGH-PRESSURE, ORIFICE-COMPENSATED HYBRID BEARINGS. Journal of Tribology.
116(1), 147-153.
-
CONNER, K. J., & CHILDS, D. W.
(1993).
ROTORDYNAMIC COEFFICIENT TEST-RESULTS FOR A 4-STAGE BRUSH SEAL. Journal of Propulsion and Power.
9(3), 462-465.
-
YANG, Z., ANDRES, L. S., & CHILDS, D. W.
(1993).
THERMAL EFFECTS IN CRYOGENIC LIQUID ANNULAR SEALS .1. THEORY AND APPROXIMATE SOLUTION. Journal of Tribology.
115(2), 267-276.
-
ANDRES, L. S., YANG, Z., & CHILDS, D. W.
(1993).
THERMAL EFFECTS IN CRYOGENIC LIQUID ANNULAR SEALS .2. NUMERICAL-SOLUTION AND RESULTS. Journal of Tribology.
115(2), 277-284.
-
YANG, Z., ANDRES, L. S., & CHILDS, D. W.
(1993).
IMPORTANCE OF HEAT-TRANSFER FROM FLUID FILM TO STATOR IN TURBULENT-FLOW ANNULAR SEALS. Wear.
160(2), 269-277.
-
KURTIN, K. A., CHILDS, D., ANDRES, L. S., HALE, K., & SCHARRER, J. K.
(1993).
EXPERIMENTAL VERSUS THEORETICAL CHARACTERISTICS OF A HIGH-SPEED HYBRID (COMBINATION HYDROSTATIC AND HYDRODYNAMIC) BEARING. Journal of Tribology.
115(1), 160-169.
-
HA, T. W., MORRISON, G. L., & CHILDS, D. W.
(1992).
FRICTION-FACTOR CHARACTERISTICS FOR NARROW CHANNELS WITH HONEYCOMB SURFACES. Journal of Tribology.
114(4), 714-721.
-
HA, T. W., CHILDS, D. W., & SCHARRER, J. K.
(1992).
FRICTION-FACTOR DATA FOR FLAT-PLATE TESTS OF SMOOTH AND HONEYCOMB SURFACES. Journal of Tribology.
114(4), 722-730.
-
CHILDS, D. W.
(1992).
PRESSURE OSCILLATION IN THE LEAKAGE ANNULUS BETWEEN A SHROUDED IMPELLER AND ITS HOUSING DUE TO IMPELLER-DISCHARGE-PRESSURE DISTURBANCES. Journal of Fluids Engineering, Transactions of the ASME.
114(1), 61-67.
-
Ha, T. W., Morrison, G. L., & Childs, D. W.
(1992).
Friction-factor characteristics for narrow channels with honeycomb surfaces. Journal of Tribology.
114(4), 714-721.
-
Ha, T. W., & Childs, D. W.
(1992).
Friction-factor data for flat-plate tests of smooth and honeycomb surfaces. Journal of Tribology.
114(4), 722-730.
-
Childs, D. W.
(1992).
Pressure oscillation in the leakage annulus between a shrouded impeller and its housing due to impeller-discharge-pressure disturbances. Journal of Fluids Engineering, Transactions of the ASME.
114(1), 61-67.
-
CHILDS, D. W.
(1991).
CENTRIFUGAL-ACCELERATION MODES FOR INCOMPRESSIBLE FLUID IN THE LEAKAGE ANNULUS BETWEEN A SHROUDED PUMP IMPELLER AND ITS HOUSING. Journal of Vibration and Acoustics: Transactions of the ASME.
113(2), 209-218.
-
Childs, D. W., Baskharone, E., & Ramsey, C.
(1991).
Test results for rotordynamic coefficients of the SSME HPOTP turbine interstage seal with two swirl brakes. Journal of Tribology.
113(3), 577-583.
-
KILGORE, J. J., & CHILDS, D. W.
(1990).
ROTORDYNAMIC COEFFICIENTS AND LEAKAGE FLOW OF CIRCUMFERENTIALLY GROOVED LIQUID-SEALS. Journal of Fluids Engineering, Transactions of the ASME.
112(3), 250-256.
-
CHILDS, D. W., NOLAN, S. A., & KILGORE, J. J.
(1990).
ADDITIONAL TEST-RESULTS FOR ROUND-HOLE-PATTERN DAMPER SEALS - LEAKAGE, FRICTION FACTORS, AND ROTORDYNAMIC FORCE COEFFICIENTS. Journal of Tribology.
112(2), 365-371.
-
CHILDS, D. W., NOLAN, S. A., & KILGORE, J. J.
(1990).
TEST-RESULTS FOR TURBULENT ANNULAR SEALS, USING SMOOTH ROTORS AND HELICALLY GROOVED STATORS. Journal of Tribology.
112(2), 254-258.
-
CHILDS, D. W.
(1989).
FLUID-STRUCTURE INTERACTION FORCES AT PUMP-IMPELLER-SHROUD SURFACES FOR ROTORDYNAMIC CALCULATIONS. Journal of Vibration and Acoustics.
111(3), 216-225.
-
ELROD, D., NELSON, C., & CHILDS, D.
(1989).
AN ENTRANCE REGION FRICTION FACTOR MODEL APPLIED TO ANNULAR SEAL ANALYSIS - THEORY VERSUS EXPERIMENT FOR SMOOTH AND HONEYCOMB SEALS. Journal of Tribology.
111(2), 337-343.
-
Childs, D., Elrod, D., & Hale, K.
(1989).
Annular Honeycomb Seals: Test Results for Leakage and Rotordynamic Coefficients; Comparisons to Labyrinth and Smooth Configurations. Journal of Tribology.
111(2), 293-300.
-
Hawkins, L., Childs, D., & Hale, K.
(1989).
Experimental Results for Labyrinth Gas Seals With Honeycomb Stators: Comparisons to Smooth-Stator Seals and Theoretical Predictions. Journal of Tribology.
111(1), 161-168.
-
CHILDS, D. W., & SCHARRER, J. K.
(1988).
THEORY VERSUS EXPERIMENT FOR THE ROTORDYNAMIC COEFFICIENT OF LABYRINTH GAS SEALS .2. A COMPARISON TO EXPERIMENT. Journal of Vibration and Acoustics.
110(3), 281-287.
-
Elrod, D., Nelson, C., & Childs, D.
(1988).
An entrance region friction factor model applied to annular seal analysis: theory versus experiment for smooth and honeycomb seals
-
Childs, D., Elrod, D., & Hale, K.
(1988).
Annular honeycomb seals: test results for leakage and rotordynamic coefficients; comparisons to labyrinth and smooth configurations. Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C.
-
Nolan, S., Nunez, D., & Childs, D. W.
(1988).
Clearance effects on leakage and rotordynamic coefficients of smooth, liquid annular seals
-
Hawkins, L., Childs, D., & Hale, K.
(1988).
Experimental results for labyrinth gas seals with honeycomb stators: comparisons to smooth-stator seals and theoretical predictions
-
KIM, C. H., & CHILDS, D. W.
(1987).
ANALYSIS FOR ROTORDYNAMIC COEFFICIENTS OF HELICALLY-GROOVED TURBULENT ANNULAR SEALS. Journal of Tribology.
109(1), 136-143.
-
Childs, D., & Garcia, F.
(1987).
Test Results for Sawtooth-Pattern Damper Seals: Leakage and Rotordynamic Coefficients. Journal of Tribology.
109(1), 124-128.
-
Childs, D., & Garcia, F.
(1987).
Test Results for Sawtooth-Pattern Damper Seals: Leakage and Rotordynamic Coefficients. Journal of Tribology.
109(1), 124-128.
-
Childs, D. W., & Scharrer, J. K.
(1986).
Experimental Rotordynamic Coefficient Results for Teeth-on-Rotor and Teeth-on-Stator Labyrinth Gas Seals. Journal of Engineering for Gas Turbines and Power.
108(4), 599-604.
-
CHILDS, D. W., & KIM, C. H.
(1986).
TEST-RESULTS FOR ROUND-HOLE-PATTERN DAMPER SEALS - OPTIMUM CONFIGURATIONS AND DIMENSIONS FOR MAXIMUM NET DAMPING. Journal of Tribology.
108(4), 605-611.
-
CHILDS, D. W., NELSON, C. E., NICKS, C., SCHARRER, J., ELROD, D., & HALE, K.
(1986).
THEORY VERSUS EXPERIMENT FOR THE ROTORDYNAMIC COEFFICIENTS OF ANNULAR GAS SEALS .1. TEST FACILITY AND APPARATUS. Journal of Tribology.
108(3), 426-432.
-
NELSON, C. C., CHILDS, D. W., NICKS, C., & ELROD, D.
(1986).
THEORY VERSUS EXPERIMENT FOR THE ROTORDYNAMIC COEFFICIENTS OF ANNULAR GAS SEALS .2. CONSTANT-CLEARANCE AND CONVERGENT-TAPERED GEOMETRY. Journal of Tribology.
108(3), 433-438.
-
Childs, D. W., & Scharrer, J. K.
(1986).
An Iwatsubo-Based Solution for Labyrinth Seals: Comparison to Experimental Results. Journal of Engineering for Gas Turbines and Power.
108(2), 325-331.
-
Childs, D. W., & Kim, C. H.
(1986).
Analysis for rotordynamic coefficients of helically-grooved turbulent annular seals
-
Childs, D. W., & Kim, C. H.
(1986).
Analysis for rotordynamic coefficients of helically-grooved turbulent annular seals. American Society of Mechanical Engineers (Paper).
-
Elrod, D. A., & Childs, D. W.
(1986).
Comparison of experimental and theoretical results for leakage, pressure gradients, and rotordynamic coefficients for tapered annular gas seal
-
CHILDS, D. W., & SCHARRER, J. K.
(1986).
EXPERIMENTAL ROTORDYNAMIC COEFFICIENT RESULTS FOR TEETH-ON-ROTOR AND TEETH-ON-STATOR LABYRINTH GAS SEALS. Journal of Engineering for Gas Turbines and Power.
108(4), 599-604.
-
Childs, D. W.
(1986).
SSME seal test program: test results for saw-tooth pattern damper seal
-
Childs, D., & Garcia, F.
(1986).
Test results for sawtooth-pattern damper seals: leakage and rotordynamic coefficients
-
CHILDS, D. W., & KIM, C. H.
(1985).
ANALYSIS AND TESTING FOR ROTORDYNAMIC COEFFICIENTS OF TURBULENT ANNULAR SEALS WITH DIFFERENT, DIRECTIONALLY-HOMOGENEOUS SURFACE-ROUGHNESS TREATMENT FOR ROTOR AND STATOR ELEMENTS. Journal of Tribology.
107(3), 296-306.
-
CHILDS, D. W., & DRESSMAN, J. B.
(1985).
CONVERGENT-TAPERED ANNULAR SEALS - ANALYSIS AND TESTING FOR ROTORDYNAMIC COEFFICIENTS. Journal of Tribology.
107(3), 307-317.
-
CHILDS, D. W., & MOYER, D. S.
(1985).
VIBRATION CHARACTERISTICS OF THE HPOTP (HIGH-PRESSURE OXYGEN TURBOPUMP) OF THE SSME (SPACE-SHUTTLE MAIN ENGINE). Journal of Engineering for Gas Turbines and Power.
107(1), 152-159.
-
Childs, D. W., & Scharrer, J. K.
(1984).
An iwatsubo-based solution for labyrinth seals - comparison with experimental results
-
Childs, D. W., & Kim, C. H.
(1984).
Analysis and testing for rotordynamic coefficients of turbulent annular seals with different, directionally homogeneous surface-roughness treatment for rotor and stator elements
-
Childs, D. W., & Kim, C. H.
(1984).
Analysis and testing for rotordynamic coefficients of turbulent annular seals with different, directionally-homogeneous surface-roughness treatment for rotor and stator elements. American Society of Mechanical Engineers (Paper).
-
Childs, D. W., & Dressman, J. B.
(1984).
Convergent-tapered annular seals: analysis and testing for rotordynamic coefficients. American Society of Mechanical Engineers (Paper).
-
Childs, D. W.
(1984).
Finite-length solutions for the rotordynamic coefficients of constant-clearance and convergent-tapered annular seals
-
Childs, D. W., & Rhode, D. L.
(1984).
Rotordynamic forces developed by labyrinth seals
-
Ehrich, F., & Childs, D.
(1984).
SELF-EXCITED VIBRATION IN HIGH-PERFORMANCE TURBOMACHINERY. Mechanical Engineering.
106(5), 66-79.
-
CHILDS, D. W., & MOYER, D. S.
(1984).
VIBRATION CHARACTERISTICS OF THE HPOTP (HIGH-PRESSURE OXYGEN TURBOPUMP) OF THE SSME (SPACE-SHUTTLE MAIN ENGINE). Mechanical Engineering.
106(7), 85-85.
-
Childs, D. W., & Moyer, D. S.
(1984).
Vibration characteristics of the HPOTP (high-pressure oxygen turbopump) of the SSME (space shuttle main engine). American Society of Mechanical Engineers (Paper).
-
CHILDS, D. W.
(1983).
DYNAMIC ANALYSIS OF TURBULENT ANNULAR SEALS BASED ON HIRS LUBRICATION EQUATION. Journal of Lubrication Technology.
105(3), 429-436.
-
Childs, D. W.
(1983).
DYNAMIC ANALYSIS OF TURBULENT ANNULAR SEALS BASED ON HIRS' LUBRICATION EQUATION. Journal of Lubrication Technology.
105(3), 429-436.
-
Childs, D. W.
(1983).
FINITE-LENGTH SOLUTIONS FOR ROTORDYNAMIC COEFFICIENTS OF TURBULENT ANNULAR SEALS. Journal of Lubrication Technology.
105(3), 437-445.
-
CHILDS, D. W.
(1982).
FRACTIONAL-FREQUENCY ROTOR MOTION DUE TO NONSYMMETRIC CLEARANCE EFFECTS. J ENG POWER TRANS ASME.
104(3), 533-541.
-
CHILDS, D. W., & GRAVISS, K.
(1982).
A NOTE ON CRITICAL-SPEED SOLUTIONS FOR FINITE-ELEMENT-BASED ROTOR MODELS. 104(2), 412-415.
-
Childs, D. W., Nelson, C., Noyes, T., & Dressman, J. B.
(1982).
A high Reynolds-number seal test facility: facility description and preliminary test data
-
Childs, D. W., Nelson, C., Noyes, T., & Dressman, J. B.
(1982).
A high-Reynolds-number seal test facility; facility description and preliminary test data
-
Childs, D. W.
(1982).
Dynamic analysis of turbulent annular seals based on Hirs' lubrication equation. American Society of Mechanical Engineers (Paper).
-
Childs, D. W.
(1982).
Dynamic analysis of turbulent annular seals based on Hirs' lubrication equation. American Society of Mechanical Engineers (Paper).
-
CHILDS, D. W.
(1982).
FRACTIONAL-FREQUENCY ROTOR MOTION DUE TO NONSYMMETRIC CLEARANCE EFFECTS. J ENG POWER TRANS ASME.
V 104(N 3), 533-541.
-
Childs, D. W.
(1982).
Finite-length solutions for rotodynamic coefficients of turbulent annular seals. American Society of Mechanical Engineers (Paper).
-
Childs, D. W.
(1982).
Finite-length solutions for rotodynamic coefficients of turbulent annular seals. American Society of Mechanical Engineers (Paper).
-
Childs, D.
(1982).
ROTORDYNAMIC MOMENT COEFFICIENTS FOR FINITE-LENGTH TURBULENT SEALS. Energia Elettrica -Milan-.
59(10), 371-378.
-
Childs, D. W.
(1982).
Rotordynamic moment coefficients for finite-length turbulent seals
-
Childs, D. W., & Dressman, J. B.
(1982).
Testing of turbulent seals for rotordynamic coefficients
-
Childs, D. W., & Dressman, J. B.
(1982).
Testing of turbulent seals for rotordynamic coefficients
-
Childs, D. W.
(1981).
Convergent-tapered annular seals analysis for rotodynamic coefficients
-
Childs, D. W.
(1981).
Convergent-tapered annular seals: analysis for rotordynamic coefficients
-
Childs, D. W.
(1981).
FRACTIONAL-FREQUENCY ROTOR MOTION DUE TO NONSYMMETRIC CLEARANCE EFFECTS. American Society of Mechanical Engineers (Paper).
-
Childs, S. B., Childs, D. W., & Dressman, J.
(1980).
ESTIMATION OF SEAL BEARING STIFFNESS AND DAMPING PARAMETERS FROM EXPERIMENTAL DATA. 175-179.
-
Childs, S. B., Childs, D. W., & Dresden, J.
(1980).
Estimation of seal bearing stiffness and damping parameters from experimental data
-
Childs, D. W., Dressman, J. B., & Childs, S. B.
(1980).
Testing of turbulent seals for rotor dynamic coefficients
-
Childs, D. W., Dressman, J. B., & Childs, S. B.
(1980).
Testing of turbulent seals for rotordynamic coefficients
-
Childs, D. W.
(1979).
Rub-Induced Parametric Excitation in Rotors. Journal of Mechanical Design - Transactions of the ASME.
101(4), 640-644.
-
Childs, D. W.
(1979).
Rub-Induced Parametric Excitation in Rotors. 101(4), 640-644.
-
Childs, D. W., & Bates, J. B.
(1978).
Residual-Flexibility Corrections for Transient Modal Rotordynamic Models. Journal of Mechanical Design - Transactions of the ASME.
100(2), 251-256.
-
Childs, D. W., & Bates, J. B.
(1978).
Residual-Flexibility Corrections for Transient Modal Rotordynamic Models. 100(2), 251-256.
-
Childs, D. W.
(1978).
The Space Shuttle Main Engine High-Pressure Fuel Turbopump Rotordynamic Instability Problem. J ENG POWER TRANS ASME.
100(1), 48-57.
-
Childs, D. W.
(1978).
The Space Shuttle Main Engine High-Pressure Fuel Turbopump Rotordynamic Instability Problem. J ENG POWER TRANS ASME.
100(1), 48-57.
-
Childs, D. W.
(1978).
The Space Shuttle main engine high pressure fuel turbopump rotordynamic instability problem
-
Childs, D. W., & Bates, J. B.
(1977).
RESIDUAL-FLEXIBILITY CORRECTIONS FOR TRANSIENT MODAL ROTORDYNAMIC MODELS. American Society of Mechanical Engineers (Paper).
-
Childs, D. W.
(1977).
SPACE SHUTTLE MAIN ENGINE HIGH-PRESSURE FUEL TURBOPUMP ROTORDYNAMIC INSTABILITY PROBLEM. American Society of Mechanical Engineers (Paper).
-
Childs, D., Moes, H., & van Leeuwen, H.
(1977).
JOURNAL BEARING IMPEDANCE DESCRIPTIONS FOR ROTORDYNAMIC APPLICATIONS. 99 Ser F(2),
-
Childs, D., Moes, H., & van Leuwen, H.
(1976).
JOURNAL BEARING IMPEDANCE DESCRIPTIONS FOR ROTORDYNAMIC APPLICATIONS
-
Childs, D. W.
(1976).
A Modal Transient Rotordynamic Model for Dual-Rotor Jet Engine Systems. Journal of Manufacturing Science and Engineering.
98(3), 876-882.
-
Childs, D. W.
(1976).
A Modal Transient Simulation Model for Flexible Asymmetric Rotors. Journal of Manufacturing Science and Engineering.
98(1), 312-319.
-
Childs, D., Moes, H., & van Leeuwen, H.
(1976).
Journal bearing impedance descriptions for rotodynamic applications
-
Childs, D. W.
(1975).
Two Jeffcott-Based Modal Simulation Models for Flexible Rotating Equipment. Journal of Manufacturing Science and Engineering.
97(3), 1000-1014.
-
Childs, D. W.
(1975).
Two Jeffcott-Based Modal Simulation Models for Flexible Rotating Equipment. Journal of Manufacturing Science and Engineering.
97(3), 1000-1014.
-
Childs, D. W.
(1975).
MODAL TRANSIENT ROTORDYNAMIC MODEL FOR DUAL-ROTOR JET ENGINE SYSTEMS. American Society of Mechanical Engineers (Paper).
-
Childs, D. W.
(1975).
MODAL TRANSIENT SIMULATION MODEL FOR FLEXIBLE ASYMMETRIC ROTORS. American Society of Mechanical Engineers (Paper).
-
CHILDS, D. W.
(1975).
TRANSIENT ROTORDYNAMIC ANALYSIS FOR THE SPACE-SHUTTLE MAIN ENGINE HIGH-PRESSURE OXYGEN TURBOPUMP. 12(1),
-
Childs, D. W.
(1974).
A Rotor-Fixed Modal Simulation Model for Flexible Rotating Equipment. Journal of Manufacturing Science and Engineering.
96(2), 659-669.
-
CHILDS, D. W., & HARDISON, T. L.
(1974).
A Movable-Mass Attitude Stabilization System For Cable-Connected Artificial-^ Space Stations. Journal of Spacecraft and Rockets.
11(3), 165-172.
-
CHILDS, D. W.
(1974).
TRANSIENT ROTORDYNAMIC ANALYSIS FOR THE SPACE-SHUTTLE MAIN ENGINE HIGH-PRESSURE OXYGEN TURBOPUMP
-
Childs, D. W.
(1973).
ROTOR-FIXED MODAL SIMULATION MODEL FOR FLEXIBLE ROTATING EQUIPMENT. American Society of Mechanical Engineers (Paper).
-
CHILDS, D. W.
(1973).
A ROTOR-FIXED MODAL SIMULATION MODEL FOR FLEXIBLE ROTATING EQUIPMENT
-
Childs, D., Moes, H., & van Leeuwen, H.
Journal bearing impedance descriptions for rotodynamic applications. 99(2 , Apr. 1977), 198-214.
-
Zhang, M., Childs, D. W., Tran, D. L., & Shresth, H.
(2020).
Effects of Clearance on the Performance of a Labyrinth Seal Under Wet-Gas Conditions. Journal of Engineering for Gas Turbines and Power.
142(11),
-
conference paper
-
Shrestha, H., Childs, D. W., Tran, D. L., & Zhang, M.
(2019).
EXPERIMENTAL STUDY OF THE STATIC AND DYNAMIC CHARACTERISTICS OF A LONG (L/D=0.75) LABYRINTH ANNULAR SEAL OPERATING UNDER TWO-PHASE (LIQUID/GAS) CONDITIONS. Journal of Engineering for Gas Turbines and Power.
-
Tran, D. L., Childs, D. W., Shrestha, H., & Zhang, M.
(2019).
PRESWIRL AND MIXED-FLOW (MAINLY-LIQUID) EFFECTS ON ROTORDYNAMIC PERFORMANCE OF A LONG (L/D=0.75) SMOOTH SEAL. Journal of Engineering for Gas Turbines and Power.
-
Balke, N. E., & Childs, D. W.
(2019).
COMPARISON OF A LIQUID ANNULAR SEAL FOR PUMP APPLICATIONS WITH AND WITHOUT A SWIRL BRAKE
-
Zhang, M., & Childs, D. W.
(2019).
A STUDY FOR ROTORDYNAMIC AND LEAKAGE CHARACTERISTICS OF A LONG-HONEYCOMB SEAL WITH TWO-PHASE, MAINLY AIR MIXTURES. Journal of Engineering for Gas Turbines and Power.
-
Zhang, M., Childs, D. W., Tran, D. L., & Shrestha, H.
(2019).
A STUDY ON THE LEAKAGE AND ROTORDYNAMIC COEFFICIENTS OF A LONG-SMOOTH SEAL WITH LAMINAR-TWO-PHASE, MAINLY-OIL MIXTURES. Journal of Engineering for Gas Turbines and Power.
-
Childs, D. W., & Mertz, D.
(2016).
COMPARATIVE LIFT-OFF PERFORMANCE IN FLEXURE PIVOT PAD AND HYBRID (HYDROSTATIC AND HYDRODYNAMIC) BEARINGS WITH WATER AS THE TEST FLUID. v07bt31a002-v07bt31a002.
-
Arthur, S. P., & Childs, D. W.
(2015).
MEASURED ROTORDYNAMIC AND LEAKAGE CHARACTERISTICS OF A TOOTH-ON-ROTOR LABYRINTH SEAL WITH COMPARISONS TO A TOOTH-ON-STATOR LABYRINTH SEAL AND PREDICTIONS. v07at31a016-v07at31a016.
-
Muhammed, A., & Childs, D. W.
(2015).
Vibration Modeling and Experimental Results of Two Phase Flow Twin-Screw Pump. v07at30a016-v07at30a016.
-
Khatri, R., & Childs, D. W.
(2014).
An Experimental Investigation of the Dynamic Performance of a Vertical-Application Three-Lobe Bearing. v07bt32a007-v07bt32a007.
-
Khatri, R., & Childs, D. W.
(2014).
An Experimental Study of the Load-Orientation Sensitivity of Three-Lobe Bearings. v07bt32a006-v07bt32a006.
-
Childs, D. W., Mclean, J., Zhang, M., & Arthurl, S. P.
(2014).
ROTORDYNAMIC PERFORMANCE OF A NEGATIVE-SWIRL BRAKE FOR A TOOTH-ON-STATOR LABYRINTH SEAL. v07at31a011-v07at31a011.
-
Tschoepe, D. P., & Childs, D. W.
(2013).
MEASUREMENTS VERSUS PREDICTIONS FOR THE STATIC AND DYNAMIC CHARACTERISTICS OF A FOUR-PAD, ROCKER-PIVOT, TILTING-PAD JOURNAL BEARING. v07at29a008-v07at29a008.
-
Childs, D. W., & Muhammed, A.
(2013).
COMMENTS ON A NEWLY-IDENTIFIED DESTABILIZING ROTORDYNAMIC MECHANISM ARISING IN VERTICAL HYDRAULIC TURBINES AND THE BACK SHROUDS OF CENTRIFUGAL IMPELLERS. v07at29a004-v07at29a004.
-
Mehta, N. J., & Childs, D. W.
(2013).
MEASURED COMPARISON OF LEAKAGE AND ROTORDYNAMIC CHARACTERISTICS FOR A SLANTED-TOOTH AND A STRAIGHT-TOOTH LABYRINTH SEAL. v07bt30a001-v07bt30a001.
-
Childs, D. W., & Arthur, S. P.
(2013).
STATIC DESTABILIZING BEHAVIOR FOR GAS ANNULAR SEALS AT HIGH ECCENTRICITY RATIOS. v07at29a003-v07at29a003.
-
Childs, D. W., Arthur, S., & Mehta, N. J.
(2013).
THE IMPACT OF HOLE DEPTH ON THE ROTORDYNAMIC AND LEAKAGE CHARACTERISTICS OF HOLE-PATTERN-STATOR GAS ANNULAR SEALS. v07at29a009-v07at29a009.
-
Brown, P. D., & Childs, D. W.
(2012).
MEASUREMENT VERSUS PREDICTIONS OF ROTORDYNAMIC COEFFICIENTS OF A HOLE-PATTERN GAS SEAL WITH NEGATIVE PRESWIRL. 2155-+.
-
Wilkes, J. C., & Childs, D. W.
(2012).
IMPROVING TILTING-PAD JOURNAL BEARING PREDICTIONS: PART I - MODEL DEVELOPMENT AND IMPACT OF ROTOR-EXCITED VERSUS BEARING-EXCITED IMPEDANCE COEFFICIENTS. 965-+.
-
Wilkes, J. C., & Childs, D. W.
(2012).
IMPROVING TILTING-PAD JOURNAL BEARING PREDICTIONS: PART II - COMPARISON OF MEASURED AND PREDICTED ROTOR-PAD TRANSFER FUNCTIONS FOR A ROCKER-PIVOT TILTING-PAD JOURNAL BEARING. 979-+.
-
Avendano, R. D., & Childs, D. W.
(2012).
ONE EXPLANATION FOR 2N RESPONSE DUE TO MISALIGNMENT IN ROTORS CONNECTED BY FLEXIBLE COUPLINGS. 563-+.
-
Muhammed, A., & Childs, D. W.
(2012).
ROTORDYNAMICS OF A 2-PHASE FLOW TWIN SCREW PUMP. 711-720.
-
Agnew, J., & Childs, D.
(2012).
Rotordynamic Characteristics of a Flexure Pivot Pad Bearing With an Active and Locked Integral Squeeze Film Damper. 551-561.
-
Vannarsdall, M., & Childs, D. W.
(2012).
STATIC AND ROTORDYNAMIC CHARACTERISTICS FOR A NEW HOLE-PATTERN ANNULAR GAS SEAL DESIGN INCORPORATING LARGER DIAMETER HOLES. 759-+.
-
Wilkes, J. C., & Childs, D. W.
(2012).
TILTING PAD JOURNAL BEARINGS - A DISCUSSION ON STABILITY CALCULATION, FREQUENCY DEPENDENCE, AND PAD AND PIVOT FLEXIBILITY. 991-+.
-
Childs, D. W., & Saha, R.
(2012).
A NEW, ITERATIVE, SYNCHRONOUS-RESPONSE ALGORITHM FOR ANALYZING THE MORTON EFFECT. 271-281.
-
Childs, D. W., & Kumar, D.
(2012).
DRY-FRICTION WHIP AND WHIRL PREDICTIONS FOR A ROTOR-STATOR MODEL WITH RUBBING CONTACT AT TWO LOCATIONS. 207-218.
-
Asirvatham, T. D., Childs, D. W., & Phillips, S.
(2012).
FRICTION FACTOR BEHAVIOR FROM FLAT-PLATE TESTS OF 12.15 mm DIAMETER HOLE-PATTERN ROUGHENED SURFACES. 247-255.
-
Kulhanek, C. D., & Childs, D. W.
(2012).
MEASURED STATIC AND ROTORDYNAMIC COEFFICIENT RESULTS FOR A ROCKER-PIVOT, TILTING-PAD BEARING WITH 50 AND 60% OFFSETS. 237-246.
-
Childs, D. W., Kheireddin, B., & Phillips, S.
(2010).
FRICTION FACTOR BEHAVIOR FROM FLAT-PLATE TESTS OF SMOOTH AND HOLE-PATTERN ROUGHENED SURFACES WITH SUPPLY PRESSURES UP TO 84 BARS. 69-79.
-
Vannini, G., Thorat, M. R., Childs, D. W., & Libraschi, M.
(2010).
Impact of Frequency Dependence of Gas Labyrinth Seal Rotordynamic Coefficients on Centrifugal Compressor Stability. 1-10.
-
Bhattacharya, A., & Childs, D. W.
(2009).
Dry-Friction Whirl and Whip Between a Rotor and a Stator: Effect of Rotor-Stator Coupling Due to Seals and Rotor Rigid-Body Dynamics. 963-972.
-
Keith, G. M., Bhattacharjee, P., Nielsen, K. K., Ha, T. W., Childs, D. W., & Platt, J. P.
(2009).
Friction Factor Jump in Honeycomb Seals Explained by Flow-Acoustic Interactions. 1073-1080.
-
Thorat, M. R., & Childs, D. W.
(2009).
PREDICTED ROTORDYNAMIC BEHAVIOR OF A LABYRINTH SEAL AS ROTOR SURFACE SPEED APPROACHES MACH 1. 699-709.
-
Childs, D. W., & Carter, C. R.
(2009).
ROTORDYNAMIC CHARACTERISTICS OF A 5 PAD, ROCKER-PIVOT, TILTING PAD BEARING IN A LOAD-ON-PAD CONFIGURATION; COMPARISONS TO PREDICTIONS AND LOAD-BETWEEN-PAD RESULTS. 867-880.
-
Wilkes, J. C., Dyck, B. J., Childs, D. W., & Phillips, S. G.
(2009).
THE NUMERICAL AND EXPERIMENTAL CHARACTERISTICS OF MULTI-MODE DRY-FRICTION WHIP AND WHIRL. 785-794.
-
van der Velde, D. E., & Childs, D. W.
(2008).
MEASUREMENTS VERSUS PREDICTIONS FOR ROTORDYNAMIC AND LEAKAGE CHARACTERISTICS OF A CONVERGENT-TAPERED, HONEYCOMB-STATOR/SMOOTH-ROTOR ANNULAR GAS SEAL. 883-889.
-
Carter, C. R., & Childs, D. W.
(2008).
MEASUREMENTS VERSUS PREDICTIONS FOR THE ROTORDYNAMIC CHARACTERISTICS OF A 5-PAD, ROCKER-PIVOT, TILTING-PAD BEARING IN LOAD BETWEEN PAD CONFIGURATION. 891-901.
-
Hensley, J. E., & Childs, D.
(2008).
Measurements Versus Predictions for Rotordynamic Characteristics of a Flexure Pivot-Pad Tilting Pad Bearing in an LBP Condition at Higher Unit Loads. 873-881.
-
Harris, J., & Childs, D.
(2008).
Static Performance Characteristics and Rotordynamic Coefficients for a Four-Pad Ball-in-Socket Tilting Pad Journal Bearing. 861-871.
-
Childs, D., Schaible, A., & Jughaiman, B. A.
(2008).
Static and Dynamic Performance of Pressure Dam Bearings With Dam Steps That Are (I) Square and (II) Filleted. 931-939.
-
Childs, D. W., & Hattacharya, A.
(2007).
Prediction of dry-friction whirl and whip between a rotor and a stator. Journal of Vibration and Acoustics: Transactions of the ASME.
355-362.
-
Sz., J. K., Childs, D., Rodriguez, M., & Garcia, J. C.
(2007).
Investigation Into a Steam Whirl Which Affected HP Rotors of 300 MW Steam Turbines. 291-298.
-
Gupta, M. K., Soulas, T. A., & Childs, D. W.
(2007).
New Steps to Improve Rotordynamic Stability Predictions of Centrifugal Compressors. 843-848.
-
Al-Jughaiman, B., & Childs, D.
(2007).
Static and Dynamic Characteristics for a Pressure-Dam Bearing. 859-867.
-
Shin, Y., & Childs, D. W.
(2007).
The Influence of Real Gas Properties on Predictions of Static and Rotordynamic Properties of Annular Seals for Injection Compressors. 791-798.
-
Zutavern, Z. S., & Childs, D. W.
(2007).
Identification of Rotordynamic Forces in a Flexible Rotor System Using Magnetic Bearings. 895-902.
-
Childs, D. W., Graviss, M., & Rodriguez, L. E.
(2006).
The influence of groove size on the static and rotordynamic characteristics of short, laminar-flow annular seals
-
Childs, D. W., & Shin, Y.
(2006).
A design to increase the static stiffness of hole pattern stator gas seals. 1279-1284.
-
Gupta, M. K., & Childs, D. W.
(2006).
Rotordynamic Stability Predictions for Centrifugal Compressors Using a Bulk-Flow Model to Predict Impeller Shroud Force and Moment Coefficients. 1211-1223.
-
Villasmil, L. A., Childs, D. W., & Chen, H. C.
(2006).
Understanding friction factor behavior in liquid annular seals with deliberately roughened surfaces, roughness geometric characteristics defining flow resistance. 1571-1579.
-
Childs, D. W., Shin, Y., & Seifert, B.
(2006).
A design to improve the effective damping characteristics of hole-pattern-stator annular gas seals. 1271-1277.
-
Al-Ghasem, A., & Childs, D.
(2005).
Rotordynamic Coefficients Measurements Versus Predictions for a High Speed Flexure-Pivot Tilting-Pad Bearing (Load-Between-Pad Configuration). 725-736.
-
Zutavern, Z. S., & Childs, D. W.
(2005).
Fiber-optic strain gauge calibration and dynamic flexibility transfer function identification in magnetic bearings. 757-762.
-
Villasmil, L. A., Childs, D. W., & Chen, H. C.
(2005).
Understanding friction factor behavior in liquid annular seals with deliberately roughened surfaces. Journal of Tribology.
213-222.
-
Sprowl, T. B., Childs, D. W., & Jordan, L. T.
(2004).
A study of the effects of inlet preswirl on the dynamic coefficients of a straight-bore honeycomb gas damper seal. 619-629.
-
Smalley, A. J., Childs, D. W., Vannini, G., Camatti, M., Hollingsworth, J. R., & Carter, J. J.
(2004).
Dynamic characteristics of the diverging taper honeycomb-stator seal. 749-756.
-
Rodriguez, L. E., & Childs, D. W.
(2004).
Experimental rotordynamic coefficient results for a load-on-pad flexible-pivot tilting-pad bearing with comparisons to predictions from bulk-flow and reynolds equation models. 529-537.
-
Picardo, A., Childs, D. W., & Jordan, L. T.
(2004).
Rotordynamic coefficients for a tooth-on-stator labyrinth seal at 70 bar supply pressures -measurements versus theory and comparisons to a hole-pattern stator seal. 607-618.
-
Villasmil, L. A., Chen, H. C., & Childs, D. W.
(2003).
Evaluation of near-wall turbulence models for liquid annular seals with roughened walls
-
Childs, D. W., & Siddiqui, N. A.
(2001).
Rotordynamics involving axial rubbing against a disk. 705-710.
-
Childs, D. W., & Jordan, L. T.
(2001).
The multiple contributions of Jorgen Lund's Ph.D. dissertation, "self-excited, stationary whirl orbits of a journal in sleeve bearings," RPI, 1966, engineering mechanics. 589-593.
-
Childs, D. W.
(2001).
Twice-running-speed response due to elliptical bearing clearances. 699-704.
-
Fayolle, P., & Childs, D. W.
(1998).
Rotordynamic evaluation of a roughened-land hybrid bearing. American Society of Mechanical Engineers (Paper).
1-6.
-
Childs, D. W., & Fayolle, P.
(1998).
Test results for liquid `damper' seals using a round-hole roughness pattern for the stators. American Society of Mechanical Engineers (Paper).
1-9.
-
Yu, Z., & Childs, D. W.
(1997).
A Comparison of Experimental Rotordynamic Coefficients and Leakage Characteristics Between Hole-Pattern Gas Damper Seals and a Honeycomb Seal. American Society of Mechanical Engineers (Paper).
v004t14a001-v004t14a001.
-
Kleynhans, G., & Childs, D.
(1997).
Acoustic influence of cell depth on the rotordynamic characteristics of smooth-rotor/honeycomb-stator annular gas seals. NASA Conference Publication.
49-76.
-
SanAndres, L., & Childs, D.
(1997).
Angled injection - Hydrostatic bearings analysis and comparison to test results. Journal of Tribology.
179-187.
-
Yu, Z., & Childs, D.
(1997).
Comparison of experimental rotordynamic coefficients and leakage characteristics between hole-pattern gas damper seals and a honeycomb seal. NASA Conference Publication.
77-93.
-
Marquette, O. R., Childs, D. W., & Phillips, S. G.
(1997).
Theory versus experiment for leakage and rotordynamic coefficients of circumferentially-grooved liquid annular seals with L/D of 0.45
-
Marquette, O. R., Childs, D. W., & San Andres, L.
(1996).
Eccentricity effects on the rotordynamic coefficients of plain annular seals: Theory versus experiment. American Society of Mechanical Engineers (Paper).
-
Kleynhans, G. F., & Childs, D. W.
(1996).
Acoustic influence of cell depth on the rotordynamic characteristics of smooth-rotor/honeycomb-stator annular gas seals. American Society of Mechanical Engineers (Paper).
-
Lindsey, W. T., & Childs, D. W.
(1995).
Effects of converging and diverging axial taper on the rotordynamic coefficients of liquid annular pressure seals: theory versus experiment. 1139-1147.
-
Marquette, O. R., & Childs, D. W.
(1995).
Extended three-control-volume theory for circumferentially-grooved liquid seals. American Society of Mechanical Engineers (Paper).
-
Mosher, P., & Childs, D. W.
(1995).
Theory versus experiment for the effects of pressure ratio on the performance of an orifice-compensated hybrid bearing. 1119-1129.
-
Childs, D. W., & Gansle, A. J.
(1995).
Experimental Leakage and Rotordynamic Results for Helically Grooved Annular Gas Seals. American Society of Mechanical Engineers (Paper).
v005t14a009-v005t14a009.
-
FRANCHEK, N. M., CHILDS, D. W., & ANDRES, L. S.
(1995).
THEORETICAL AND EXPERIMENTAL COMPARISONS FOR ROTORDYNAMIC COEFFICIENTS OF A HIGH-SPEED, HIGH-PRESSURE, ORIFICE-COMPENSATED HYBRID BEARING. Journal of Tribology.
285-290.
-
Elrod, D. A., Pelletti, J. M., & Childs, D. W.
(1995).
Theory versus experiment for the rotordynamic coefficients of an interlocking labyrinth gas seal. American Society of Mechanical Engineers (Paper).
-
Hendricks, R. C., Liang, A. D., Childs, D. W., & Proctor, M. P.
(1992).
Development of Advanced Seals for Space Propulsion Turbomachinery. SAE Technical Papers.
-
Yang, Z., San Andres, L., & Childs, D. W.
(1992).
Thermal effects in cryogenic liquid annular seals. Part I. Theory and approximate solution. American Society of Mechanical Engineers (Paper).
1-10.
-
San Andres, L., Yang, Z., & Childs, D. W.
(1992).
Thermal effects in cryogenic liquid annular seals. Part II. Numerical solution and results. American Society of Mechanical Engineers (Paper).
1-8.
-
Kurtin, K. A., Childs, D., San Andres, L., & Hale, K.
(1991).
Experimental versus theoretical characteristics of a high-speed hybrid (combination hydrostatic and hydrodynamic) bearing. American Society of Mechanical Engineers (Paper).
1-9.
-
Ha, T. W., Morrison, G. L., & Childs, D. W.
(1991).
Friction-factor characteristics for narrow channels with honeycomb surfaces. American Society of Mechanical Engineers (Paper).
1-8.
-
Ha, T. W., & Childs, D. W.
(1991).
Friction-factor data for flat-plate tests of smooth and honeycomb surfaces. American Society of Mechanical Engineers (Paper).
1-8.
-
CHILDS, D. W., BASKHARONE, E., & RAMSEY, C.
(1991).
TEST-RESULTS FOR ROTORDYNAMIC COEFFICIENTS OF THE SSME HPOTP TURBINE INTERSTAGE SEAL WITH 2 SWIRL BRAKES. Journal of Tribology.
577-583.
-
CHILDS, D. W., & RAMSEY, C.
(1991).
SEAL-ROTORDYNAMIC-COEFFICIENT TEST-RESULTS FOR A MODEL SSME ATD-HPFTP TURBINE INTERSTAGE SEAL WITH AND WITHOUT A SWIRL BRAKE. Journal of Tribology.
198-203.
-
ELROD, D. A., CHILDS, D. W., & NELSON, C. C.
(1990).
AN ANNULAR GAS SEAL ANALYSIS USING EMPIRICAL ENTRANCE AND EXIT REGION FRICTION FACTORS. Journal of Tribology.
196-204.
-
Childs, D. W., Nolan, S. A., & Kilgore, J. J.
(1990).
Additional Test Results for Round-Hole-Pattern Damper Seals: Leakage, Friction Factors, and Rotordynamic Force Coefficients. Journal of Tribology.
365-371.
-
Childs, D. W., Nolan, S. A., & Kilgore, J. J.
(1990).
Test Results for Turbulent Annular Seals, Using Smooth Rotors and Helically Grooved Stators. Journal of Tribology.
254-258.
-
Elrod, D. A., Childs, D. W., & Nelson, C. C.
(1989).
Annular gas seal analysis using empirical entrance and exit region friction factors. American Society of Mechanical Engineers (Paper).
-
Williams, J. P., & Childs, D. W.
(1989).
Influence of impeller shroud forces on turbopump rotor dynamics. 41-49.
-
Kilgore, J. J., & Childs, D. W.
(1989).
Rotordynamic coefficients and leakage flow of circumferentially-grooved liquid-seals. 195-203.
-
Childs, D., Elrod, D., & Hale, K.
(1988).
Annular honeycomb seals: Test results for leakage and rotordynamic coefficients; comparisons to labyrinth and smooth configurations. American Society of Mechanical Engineers (Paper).
-
Elrod, D., Nelson, C., & Childs, D.
(1988).
Entrance region friction factor model applied to annular seal analysis: Theory versus experiment for smooth and honeycomb seals. American Society of Mechanical Engineers (Paper).
-
Hawkins, L., Childs, D., & Hale, K.
(1988).
Experimental results for labyrinth gas seals with honeycomb stators: Comparisons to smooth-stator seals and theoretical predictions. American Society of Mechanical Engineers (Paper).
-
Childs, D. W., Elrod, D. A., & Hale, K.
(1988).
ROTORDYNAMIC COEFFICIENT AND LEAKAGE TEST RESULTS FOR INTERLOCK AND TOOTH-ON-STATOR LABYRINTH SEALS. American Society of Mechanical Engineers (Paper).
-
Childs, D. W.
(1987).
FLUID-STRUCTURE INTERACTION FORCES AT PUMP-IMPELLER-SHROUD SURFACES FOR ROTORDYNAMIC CALCULATIONS. 581-594.
-
Childs, D. W., & Scharrer, J. K.
(1987).
THEORY VERSUS EXPERIMENT FOR THE ROTORDYNAMIC COEFFICIENTS OF LABYRINTH GAS SEALS: PART II - A COMPARISON TO EXPERIMENT. 427-434.
-
Kim, C. H., & Childs, D. W.
(1986).
ANALYSIS FOR ROTORDYNAMIC COEFFICIENTS OF HELICALLY-GROOVED TURBULENT ANNULAR SEALS. American Society of Mechanical Engineers (Paper).
-
Childs, D. W., & Scharrer, J. K.
(1986).
EXPERIMENTAL ROTORDYNAMIC COEFFICIENT RESULTS FOR TEETH-ON-ROTOR AND TEETH-ON-STATOR LABYRINTH GAS SEALS. NASA Conference Publication.
259-275.
-
Childs, D. W.
(1986).
FORCE AND MOMENT ROTORDYNAMIC COEFFICIENTS FOR PUMP-IMPELLER SHROUD SURFACES. NASA Conference Publication.
503-529.
-
Childs, D., & Garcia, F.
(1986).
TEST RESULTS FOR SAWTOOTH-PATTERN DAMPER SEALS: LEAKAGE AND ROTORDYNAMIC COEFFICIENTS. American Society of Mechanical Engineers (Paper).
-
CHILDS, D. W., & SCHARRER, J. K.
(1986).
AN IWATSUBO-BASED SOLUTION FOR LABYRINTH SEALS - COMPARISON TO EXPERIMENTAL RESULTS. Journal of Engineering for Gas Turbines and Power.
325-331.
-
Childs, D. W., & Moyer, D. S.
(1985).
SAMPLE ROTORDYNAMIC CALCULATIONS USING CAL-TECH ROTORDYNAMIC COEFFICIENTS. 29-32.
-
Childs, D. W., & Moyer, D. S.
(1985).
VIBRATION CHARACTERISTICS OF THE HPOTP (HIGH PRESSURE OXYGEN TURBOPUMP) OF THE SSME (SPACE SHUTTLE MAIN ENGINE). NASA Conference Publication.
452-481.
-
Childs, D. W., & Kim, C. H.
(1984).
ANALYSIS AND TESTING FOR ROTORDYNAMIC COEFFICIENTS OF TURBULENT ANNULAR SEALS WITH DIFFERENT, DIRECTIONALLY HOMOGENEOUS SURFACE-ROUGHNESS TREATMENT FOR ROTOR AND STATOR ELEMENTS. NASA Conference Publication.
313-340.
-
Childs, D. W., & Kim, C. H.
(1984).
ANALYSIS AND TESTING FOR ROTORDYNAMIC COEFFICIENTS OF TURBULENT ANNULAR SEALS WITH DIFFERENT, DIRECTIONALLY-HOMOGENEOUS SURFACE-ROUGHNESS TREATMENT FOR ROTOR AND STATOR ELEMENTS. American Society of Mechanical Engineers (Paper).
-
Childs, D. W., & Dressman, J. B.
(1984).
CONVERGENT-TAPERED ANNULAR SEALS: ANALYSIS AND TESTING FOR ROTORDYNAMIC COEFFICIENTS. American Society of Mechanical Engineers (Paper).
-
Childs, D. W.
(1984).
FINITE-LENGTH SOLUTIONS FOR THE ROTORDYNAMIC COEFFICIENTS OF CONSTANT-CLEARANCE AND CONVERGENT-TAPERED ANNULAR SEALS. I Mech E Conference Publications (Institution of Mechanical Engineers).
223-231.
-
Childs, D. W., & Scharrer, J. K.
(1984).
IWATSUBO-BASED SOLUTION FOR LABYRINTH SEALS - COMPARISON WITH EXPERIMENTAL RESULTS. NASA Conference Publication.
257-279.
-
Childs, D. W., & Moyer, D. S.
(1984).
VIBRATION CHARACTERISTICS OF THE HPOTP (HIGH-PRESSURE OXYGEN TURBOPUMP) OF THE SSME (SPACE SHUTTLE MAIN ENGINE). American Society of Mechanical Engineers (Paper).
-
Childs, D. W., & Moyer, D. S.
(1984).
VIBRATION CHARACTERISTICS OF THE HPOTP (HIGH-PRESSURE OXYGEN TURBOPUMP) OF THE SSME (SPACE SHUTTLE MAIN ENGINE). American Society of Mechanical Engineers (Paper).
-
Childs, D. W., & Dressman, J. B.
(1983).
TESTING OF TURBULENT SEALS FOR ROTOR DYNAMIC COEFFICIENTS
-
CHILDS, D. W.
(1983).
FINITE-LENGTH SOLUTIONS FOR ROTORDYNAMIC COEFFICIENTS OF TURBULENT ANNULAR SEALS. Journal of Lubrication Technology.
437-445.
-
Childs, D. W.
(1982).
DYNAMIC ANALYSIS OF TURBULENT ANNULAR SEALS BASED ON HIRS LUBRICATION EQUATION. American Society of Mechanical Engineers (Paper).
-
Childs, D. W., Nelson, C., Noyes, T., & Dressman, J. B.
(1982).
HIGH-REYNOLDS-NUMBER SEAL TEST FACILITY: FACILITY DESCRIPTION AND PRELIMINARY TEST DATA. NASA Conference Publication.
172-186.
-
Childs, D. W., & Dressman, J. B.
(1982).
TESTING OF TURBULENT SEALS FOR ROTORDYNAMIC COEFFICIENTS. NASA Conference Publication.
157-171.
-
Childs, D. W.
(1981).
CONVERGENT-TAPERED ANNULAR SEALS: ANALYSIS FOR ROTORDYNAMIC COEFFICIENTS. 35-44.
-
Shrestha, H., Childs, D. W., Tran, D. L., & Zhang, M.
(2019).
EXPERIMENTAL STUDY OF THE STATIC AND DYNAMIC CHARACTERISTICS OF A LONG (L/D=0.75) LABYRINTH ANNULAR SEAL OPERATING UNDER TWO-PHASE (LIQUID/GAS) CONDITIONS. Journal of Engineering for Gas Turbines and Power.
-
patent
-
Childs, D.
(2015).
Annular seals for non-contact sealing of fluids in turbomachinery
-
Childs, D.
(2014).
Annular seals for non-contact sealing of fluids in turbomachinery
-
Childs, D.
(2011).
Annular seals for non-contact sealing of fluids in turbomachinery
-
Childs, D.
(2003).
System and method for measuring dynamic loads in a magnetic bearing
-
Childs, D.
(2015).
Annular seals for non-contact sealing of fluids in turbomachinery
Teaching
teaching activities
- MEEN684 Professional Internship Instructor
- MEEN685 Directed Studies Instructor
- MEEN691 Research Instructor
Works By Students
chaired theses and dissertations
-
Aboel Hassan Muhammed, Ameen (2013-02). Rotordynamics of Twin-Screw Pumps.
-
Agnew, Jeffrey Scott (2012-02). Rotordynamic Performance of a Flexure Pivot Pad Bearing with Active and Locked Integral Squeeze Film Damper Including Predictions.
-
Al Jughaiman, Bader K. (2006-08). Static and dynamic characteristics for a two-axial-groove bearing and a pressure-dam bearing.
-
Arthur, Stephen Patrick (2015-12). Measured Rotordynamic Coefficients and Leakage for a Tooth-on-Rotor Labyrinth Seal with Comparisons to a Tooth-on-Stator Labyrinth Seal.
-
Avendano Ovalle, Raul David (2011-10). An Analysis of the Impact of Flexible Coupling Misalignment on Rotordynamics.
-
Balke, Nathan Edward (2017-12). Analyzing the Influence of a Swirl Brake on a Smooth Liquid Annular Seal Through Measuring Static and Rotordynamic Characteristics.
-
Brown, Philip David (2012-10). Measurement Versus Predictions of Rotordynamic Coefficients and Leakage Rates for a Hole-Pattern Gas Seal with Negative Preswirl.
-
Bullock, Joshua Thomas (2019-03). The Effects of Imposed Pre-Swirl on the Static and Rotordynamic Performance for Smooth Annular Liquid Seals.
-
Carter, Clint Ryan (2007-08). Measured and predicted rotordynamic coefficients and static performance of a rocker-pivot, tilt pad bearing in load-on-pad and load-between-pad configurations.
-
Coghlan, David (2014-08). Static, Rotordynamic, and Thermal Characteristics of a Four Pad Spherical-Seat Tilting Pad Journal Bearing with Four Methods of Directed Lubrication.
-
Deva Asirvatham, Thanesh (2010-12). Friction Factor Measurement, Analysis, and Modeling for Flat-Plates with 12.15 mm Diameter Hole-Pattern, Tested with Air at Different Clearances, Inlet Pressures, and Pressure Ratios.
-
Eitrheim, Nathan David (2017-10). Measured Static and Rotordynamic Characteristics of a Circumferentially-grooved-stator/smooth-rotor Liquid Annular Seal: Influence of Viscosity, Eccentricity, Pressure, and Speed.
-
Elrod, David Alan (1988-08). Entrance and exit region friction factor models for annular seal analysis.
-
Esser, Paul R. (2010-05). Measurements versus Predictions for a Hybrid (Hydrostatic plus Hydrodynamic Thrust Bearing for a Range of Orifice Diameters.
-
Gaines, Jennifer Elizabeth (2014-12). Examining the Impact of Pad Flexibility on the Rotordynamic Coefficients of Rocker-Pivot-Pad Tilting-Pad Journal Bearings.
-
Gary, Keith William (2017-10). Measurements of the Leakage and Rotordynamic Performance of Interlocking Labyrinth Seals.
-
James, Stephen M. (2010-05). Adapting a Beam-Based Rotordynamics Model to Accept a General Three-Dimensional Finite-Element Casing Model.
-
Kerr, Thomas Chandler (2017-10). Static and Dynamic Coefficient Measurements for a Thrust Collar Used in an Integrally Geared Compressor.
-
Khatri, Rasish (2014-08). An Experimental Investigation of the Static and Dynamic Performance of Horizontal-Application and Vertical-Application Three-Lobe Bearings.
-
Kheireddin, Bassem A. (2009-08). Investigation Of The Friction Factor Behavior for Flat Plate Tests Of Smooth And Roughened Surfaces With Supply Pressures Up To 84 Bars.
-
Klooster, David (2009-12). Transient Lift-off Test Results for an Experimental Hybrid Bearing in Air.
-
Kluitenberg, Matthew P (2015-04). Experimentally Determine the Impact of Jacking-Oil Pockets on the Rotordynamic Characteristics of a Four-Pad, LBP, Tilting-Pad Journal Bearing.
-
Kulhanek, Chris David (2012-02). Dynamic and Static Characteristics of a Rocker-Pivot, Tilting-Pad Bearing with 50% and 60% Offsets..
-
Kumar, Dhruv Dileep (2011-10). Backward Precessional Whip and Whirl for a Two Point Rubbing Contact Model of a Rigid Rotor Supported by an Elastically Supported Rigid Stator.
-
Mehta, Naitik (2012-07). Comparison of a Slanted-Tooth See-Through Labyrinth Seal to a Straight-Tooth See-Through Labyrinth Seal for Rotordynamic Coefficients and Leakage.
-
Moreland, James Alexander (2016-05). Influence of Pre-Swirl and Eccentricity in Smooth Stator/Grooved Rotor Liquid Annular Seals, Measured Static and Rotordynamic Characteristics.
-
Najeeb, Ovais Ahmed Bin (2017-11). Static and Rotordynamic Analysis of a Plain Annular (Liquid) Seal in the Laminar Regime with a Swirl Brake for Three Clearances.
-
Norrbin, Clay Sven (2016-12). Housing Shape's Impact on Electric Submersible Pump's Equilibrium Position and Rotordynamics.
-
Ramirez Alanis, Mauricio Alan (2017-12). Development and Validation of Test Rig for Measurements of Leakage and Rotordynamic Performance of Interlocking Gas Labyrinth Seals.
-
Rodrigues Rodrigues, Margarita (2006-12). Improving performance and rotordynamic characteristics of injection compressors via much longer balance-piston and division-wall seals.
-
Saha, Rohit (2012-02). A New, Iterative, Synchronous-Response Algorithm for Analyzing the Morton Effect.
-
Salas III, Jesus (2016-05). Influence of Pressure-Dams in Liquid Annular Seals in the Laminar Flow Regime, Measured Results for Static and Rotordynamic Characteristics.
-
Shrestha, Hari Krishna (2018-03). Experimental Study of the Static and Dynamic Characteristics of a Long (L/D=0.75) Labyrinth Annular Seal Operating Under Two-Phase (Liquid/Gas) Conditions.
-
Thorat, Manish R. (2010-05). Impact of Rotor Surface Velocity, Leakage Models and Real Gas Properties on Rotordynamic Force Predictions of Gas Labyrinth Seals.
-
Torres, Jose Maria (2016-12). Static and Rotordynamic Characteristics of Liquid Annular Seals with a Circumferentially-Grooved Stator and Smooth Rotor using Three Levels of Circumferential Inlet-Fluid Rotation.
-
Tschoepe, David 1987- (2012-08). Measurements Versus Predictions for the Static and Dynamic Characteristics of a Four-pad Rocker-pivot, Tilting-pad Journal Bearing.
-
Vannarsdall, Michael Lloyd (2012-10). Measured Results for a New Hole-Pattern Annular Gas Seal Incorporating Larger Diameter Holes, Comparisons to Results for a Traditional Hole-Pattern Seal and Predictions.
-
Wilkes, Jason C. (2008-08). A PERSPECTIVE ON THE NUMERICAL AND EXPERIMENTAL CHARACTERISTICS OF MULTI-MODE DRY-FRICTION WHIP AND WHIRL.
-
Wilkes, Jason Christopher (2012-02). Measured and Predicted Rotor-Pad Transfer Functions for a Rocker-Pivot Tilting-Pad Journal Bearing.
-
Zhang, Min (2017-12). Experimental Study of the Static and Dynamic Characteristics of a Long (L/D=0.65) Smooth Annular Seal Operating Under Two-Phase (Liquid/Gas) Conditions.
-
Zutavern, Zachary Scott (2006-08). Identification of rotordynamic forces in a flexible rotor system using magnetic bearings.
Background
education and training
awards and honors
- Cliff Garrett Turbomachinery Engineering Award, conferred by Society of Automotive Engineers International - (Troy, Michigan, United States), 2014
- Outstanding Undergraduate Teaching Award, conferred by Texas A&M University - (College Station, Texas, United States), 2001
- Fellow, conferred by American Society of Mechanical Engineers - (New York, New York, United States), 1990
Contact
first name
- Dara
has last name
- Childs
mailing address
-
Texas A&M University
Mechanical Engineering
3123 TAMU
College Station, TX 77843-3123
USA
Other
- d-childs@tamu.edu