On the Dynamic Thermal State in a Hydrodynamic Bearing With a Whirling Journal Using CFD Techniques

[+] Author and Article Information
P. G. Tucker, P. S. Keogh

School of Mechanical Engineering, University of Bath, Bath BA2 7AY, United Kingdom

J. Tribol 118(2), 356-363 (Apr 01, 1996) (8 pages) doi:10.1115/1.2831309 History: Received January 27, 1995; Revised July 05, 1995; Online January 24, 2008


A thermohydrodynamic analysis, based on computational fluid dynamics (CFD) techniques, that accounts for conduction in the rotating and orbiting shaft of a hydrodynamic bearing is presented. No restrictions apply to the circumferential or axial variation of journal/shaft temperature. Dynamic cavitation effects are also introduced, such that pressures in the cavitation region are predicted rather than set. The model predictions are validated against analytical and published experimental results. For the case of a centrally located synchronous forward circular whirl orbit, it is demonstrated that the journal does not behave as a circumferentially isothermal element and that significant steady temperature differentials across the journal may occur.

Copyright © 1996 by The American Society of Mechanical Engineers
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