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RESEARCH PAPERS

Analysis of Turbulent Hydrostatic Bearings With a Barotropic Cryogenic Fluid

[+] Author and Article Information
Luis A. San Andres

Mechanical Engineering Department, Texas A&M University, College Station, Texas 77845

J. Tribol 114(4), 755-764 (Oct 01, 1992) (10 pages) doi:10.1115/1.2920945 History: Received January 18, 1991; Revised June 11, 1991; Online June 05, 2008

Abstract

Hydrostatic journal bearings handling low viscosity cryogenic liquids operate under extreme conditions of external pressurization. The regime of operation of these bearings is fully turbulent with large fluid inertia effects. Furthermore, cryogenic liquid propeties depend strongly on the local pressure and affect the bearing leakage and force response. The turbulent flow of a barotropic cryogenic fluid in a hydrostatic bearing is considered. Advection fluid inertia, recess-edge fluid inertia and liquid compressibility, and bearing surface roughnesses are included in the analysis. Numerical results for a liquid hydrogen hydrostatic bearing show that an incompressible fluid model overpredicts flow rate and force coefficients when compared to the more realistic barotropic fluid model.

Copyright © 1992 by The American Society of Mechanical Engineers
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