An entrance region friction factor model applied to annular seal analysis: theory versus experiment for smooth and honeycomb seals.
Academic Article
Overview
Overview
abstract
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 Nelson's. 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 prerotation. The model predicts direct stiffness poorly.