Thermohydrodynamic Analysis of Submerged Oil Journal Bearings Considering Surface Roughness Effects

[+] Author and Article Information
J. Ramesh, B. C. Majumdar, N. S. Rao

Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur 721 302, India

J. Tribol 119(1), 100-106 (Jan 01, 1997) (7 pages) doi:10.1115/1.2832442 History: Received April 24, 1994; Revised April 24, 1996; Online January 24, 2008


A theoretical study of a submerged oil journal bearing is made considering surface roughness and thermal effects. The total load-supporting ability under such condition is due to the thermohydrodynamic as well as the asperity contact pressure. The effect of surface roughness and viscosity-temperature dependency on hydrodynamic pressure has been found by solving the average Reynolds equation, energy equation and heat conduction equations simultaneously. The cavitation model of Jacobsson-Floberg has been modified to take the surface roughness effects into consideration. A parametric study of steady-state behavior has been carried out. Finally, the isothermal, thermohydrodynamic, and contact loads for a model bearing have been calculated, assuming the surface height distribution as Gaussian.

Copyright © 1997 by The American Society of Mechanical Engineers
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