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RESEARCH PAPERS

Momentum and Energy Approximations for Elementary Squeeze-Film Damper Flows

[+] Author and Article Information
S. H. Crandall

Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139

A. EI-Shafei

Department of Mechanical Design and Production, Cairo University, Giza, Egypt

J. Appl. Mech 60(3), 728-736 (Sep 01, 1993) (9 pages) doi:10.1115/1.2900865 History: Received August 20, 1990; Revised June 03, 1992; Online March 31, 2008

Abstract

To provide understanding of the effects of inertia on squeeze-film damper performance, two elementary flow patterns are studied. These elementary flows each depend on a single generalized motion coordinate whereas general planar motions of a damper are described by two independent generalized coordinates. Momentum and energy approximations for the elementary flows are compared with exact solutions. It is shown that the energy approximation, not previously applied to squeeze films, is superior to the momentum approximation in that at low Reynolds number the energy approximations agree with the exact solutions to first order in the Reynolds number whereas there are 20 percent errors in the first-order terms of the momentum approximations.

Copyright © 1993 by The American Society of Mechanical Engineers
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