Prediction of Stiffness and Damping Coefficients for Centrifugal Compressor Labyrinth Seals

[+] Author and Article Information
H. R. Wyssmann, T. C. Pham, R. J. Jenny

Sulzer-Escher Wyss, Ltd., Zurich, Switzerland

J. Eng. Gas Turbines Power 106(4), 920-926 (Oct 01, 1984) (7 pages) doi:10.1115/1.3239659 History: Received January 06, 1984; Online October 15, 2009


A theory is presented for the calculation of stiffness and damping coefficients of the fluid-rotor interaction in centrifugal compressor labyrinth seals based on turbulent flow calculations. The theory has been confirmed by measurements on labyrinth test stands and on a centrifugal compressor impeller shroud seal at pressures up to 140 bar. Predicted rotor stability limits based on the theory are in agreement with those observed in real compressors.

Copyright © 1984 by ASME
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