RESEARCH PAPERS: Vibration and Sound

Theory Versus Experiment for the Rotordynamic Coefficient of Labyrinth Gas Seals: Part II—A Comparison to Experiment

[+] Author and Article Information
D. W. Childs, J. K. Scharrer

Mechanical Engineering Department, Texas A&M University, College Station, TX

J. Vib., Acoust., Stress, and Reliab 110(3), 281-287 (Jul 01, 1988) (7 pages) doi:10.1115/1.3269514 History: Received August 12, 1987; Online November 23, 2009


An experimental test facility is used to measure the leakage and rotordynamic coefficients of teeth-on-rotor and teeth-on-stator labyrinth gas seals. The test results are presented along with the theoretically predicted values for the two seal configurations at three different radial clearances and shaft speeds to 16,000 cpm. The test results show that the theory accurately predicts the cross-coupled stiffness for both seal configurations and shows improvement in the prediction of the direct damping for the teeth-on-rotor seal. The theory fails to predict a decrease in the direct damping coefficient for an increase in the radial clearance for the teeth-on-stator seal.

Copyright © 1988 by ASME
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