Quasi-Static Analysis of Foil Journal Bearings for a Brayton Cycle Turboalternator

[+] Author and Article Information
A. Eshel

Ampex Corporation, Redwood City, Calif.

J. of Lubrication Tech 97(3), 516-524 (Jul 01, 1975) (9 pages) doi:10.1115/1.3452657 History: Received July 08, 1974; Online October 18, 2010


A quasi-static analysis is presented for foil journal bearings designed for a NASA Brayton Cycle Turboalternator. Included in the analysis are effects of “slack” (due to flexural rigidity of the foil), of frictionally restrained extension of the foil-length in contact with cylindrical guides, of fluid inertia and compressibility, and of thermal expansion of rotor, foil and supporting structure. Comparisons are made with results of early experiments performed by Licht [1, 2] and recent data of Licht and Branger [6, 7]. Variations of film thickness, foil tension and bearing stiffness are presented graphically as functions of pertinent parameters for the case of operation in zero-gravity environment.

Copyright © 1975 by ASME
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