Study of Conical Whirl Instability of Self-Acting Porous Gas Journal Bearings Considering Tangential Velocity Slip

[+] Author and Article Information
S. K. Guha, N. S. Rao, B. C. Majumdar

Mechanical Engineering Department, Indian Institute of Technology, Kharagpur, India

J. Tribol 110(1), 139-143 (Jan 01, 1988) (5 pages) doi:10.1115/1.3261552 History: Received January 02, 1987; Online October 29, 2009


The purpose of the present work is to study theoretically the conical whirl instability of unloaded self-acting porous gas journal bearings considering the tangential velocity slip at the bearing-film interface. The hydrodynamic pressure developed in the bearing clearance due to angular displacements of the journal at the midplane of the bearing is obtained by the simultaneous solution of equation of continuity in the porous medium and the modified Reynolds equations, satisfying the appropriate boundary conditions. With the help of the dynamic tilting stiffness and damping coefficients, stability characteristic is obtained. The effects of various parameters on conical stability parameter have been investigated for a nongyroscopic system.

Copyright © 1988 by ASME
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