Calculation of Rotordynamic Coefficients and Leakage for Annular Gas Seals by Means of Finite Difference Techniques

[+] Author and Article Information
R. Nordmann, F. J. Dietzen, H. P. Weiser

Universität Kaiserslautern, Kaiserslautern, Federal Republic of Germany

J. Tribol 111(3), 545-552 (Jul 01, 1989) (8 pages) doi:10.1115/1.3261964 History: Received December 15, 1986; Online October 29, 2009


The compressible flow in a seal can be described by the Navier-Stokes equations in connection with a turbulence model (k–ε model) and an energy equation. By introducing a perturbation analysis in these differential equations we obtain zeroth order equations for the centered position and first order equations for small motions of the shaft about the centered position. These equations are solved by a finite difference technique. The zeroth order equations describe the leakage flow. Integrating the pressure solution of the first order equations yields the fluid forces and the rotordynamic coefficients, respectively.

Copyright © 1989 by ASME
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