An Entrance Region Friction Factor Model Applied to Annular Seal Analysis: Theory Versus Experiment for Smooth and Honeycomb Seals

[+] Author and Article Information
D. Elrod, C. Nelson, D. Childs

Turbomachinery Laboratory, Mechanical Engineering Department, Texas A&M University, College Station, Texas 77843

J. Tribol 111(2), 337-343 (Apr 01, 1989) (7 pages) doi:10.1115/1.3261919 History: Received March 07, 1988; Online October 29, 2009


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 (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 prerotation. The model predicts direct stiffness poorly.

Copyright © 1989 by ASME
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