ANALYSIS AND TESTING FOR ROTORDYNAMIC COEFFICIENTS OF TURBULENT ANNULAR SEALS WITH DIFFERENT, DIRECTIONALLY-HOMOGENEOUS SURFACE-ROUGHNESS TREATMENT FOR ROTOR AND STATOR ELEMENTS.
A combined analytical-computational method is developed to calculate the transient pressure field and dynamic coefficients for high-pressure annular seal configurations which may be used in interstage and neck-ring seals of multistage centrifugal pumps. The solution procedure applies to constant-clearance or convergent-tapered geometries which may have different (but directionally-homogeneous) surface-roughness treatments on the stator or rotor seal elements. It applies in particular so-called 'damper-seals' which employ smooth rotors and deliberately-roughened stator elements to enhance rotor stability.
author list (cited authors)
Childs, D. W., & Kim, C. H.