Prediction of Incompressible Flow in Labyrinth Seals

[+] Author and Article Information
D. L. Rhode, J. A. Demko, U. K. Traegner, G. L. Morrison, S. R. Sobolik

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

J. Fluids Eng 108(1), 19-25 (Mar 01, 1986) (7 pages) doi:10.1115/1.3242535 History: Received May 04, 1984; Online October 26, 2009


A new approach was developed and tested for alleviating the substantial convergence difficulty which results from implementation of the QUICK differencing scheme into a TEACH-type computer code. It is relatively simple, and the resulting CPU time and number of numerical iterations required to obtain a solution compare favorably with a previously recommended method. This approach has been employed in developing a computer code for calculating the pressure drop for a specified incompressible flow leakage rate in a labyrinth seal. The numerical model is widely applicable and does not require an estimate of the kinetic energy carry-over coefficient for example, whose value is often uncertain. Good agreement with measurements is demonstrated for both straight-through and stepped labyrinths. These new detailed results are examined, and several suggestions are offered for the advancement of simple analytical leakage as well as rotordynamic stability models.

Copyright © 1986 by ASME
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