Effect of a Rough Translating Surface on Gas Film Lubrication: A Numerical and Analytical Study

[+] Author and Article Information
J. W. White, P. E. Raad

Department of Mechanical and Aerospace Engineering, The University of Tennessee, Knoxville, TN 37996-2210

J. Tribol 109(2), 271-275 (Apr 01, 1987) (5 pages) doi:10.1115/1.3261350 History: Received March 01, 1986; Online October 29, 2009


A thin gas film wide wedge bearing with rough translating surface is studied both numerically and analytically. The fluctuating inlet flow area causes a symmetric wave to be generated from the inlet boundary which travels at half the translating surface velocity, possesses a wavelength half that of the surface roughness, and which decays in amplitude in the direction of motion. Since the wave is out of phase with the surface roughness, it has essentially no influence on the load. The load generated varies monotonically with gas bearing number and at a finite bearing number is less than the load developed with the rough stationary surface bearing.

Copyright © 1987 by ASME
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