Entrance region friction factor model applied to annular seal analysis: Theory versus experiment for smooth and honeycomb seals
A friction factor model is developed for the entrance-region of a duct. The model is used in an annular gas seal analysis similar to C. C. Nelson's (1984). Predictions of the analysis are compared to experimental results for a smooth-stator/smooth-rotor seal and three honeycomb-stator/smooth-rotor seals. The model predicts leakage and direct damping well. The model overpredicts the dependence of cross-coupled stiffness on fluid preparation. The model predicts direct stiffness poorly.
author list (cited authors)
Elrod, D., Nelson, C., & Childs, D.