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RESEARCH PAPERS

Application of the k-ε Turbulence Model to the Squeeze Film Damper

[+] Author and Article Information
Chiao-Ping Ku, John A. Tichy

Department of Mechanical Engineering, Aeronautical Engineering & Mechanics, Rensselaer Polytechnic Institute, Troy, New York 12180-3590

J. Tribol 109(1), 164-168 (Jan 01, 1987) (5 pages) doi:10.1115/1.3261311 History: Received February 21, 1986; Online October 29, 2009

Abstract

The one-dimensional squeeze film damper is modeled for high speed flow by using the two-equation (k-ε) turbulent transport model. The assumption is made that the fluid flow at each local region of the squeeze film damper has similar behavior to inertialess flow in a channel at comparable Reynolds number. Using the k-ε model, the inertialess channel flow case is solved. Based on this result, correlations are obtained for the mean velocity, inertia and viscous terms of the integrated momentum equation for the squeeze film damper. It is found that turbulence increases the magnitude of the fluid pressure and the tangential force, while fluid inertia causes a shift on the pressure creating a significant radial force. In applications, turbulence may be a beneficial effect, increasing the principal damping force; while inertia may be detrimental increasing the cross-coupling forces.

Copyright © 1987 by ASME
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