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TECHNICAL PAPERS

Analysis and Test of a Robust Sector Thrust Bearing for a Cryogenic Turboalternator

[+] Author and Article Information
G. F. Nellis

Mechanical Engineering Dept., University of Wisconsin, Madison, WI 53706e-mail: gfnellis@engr.wisc.edu

M. V. Zagarola, H. Sixsmith

Creare Incorporated, Etna Road, P.O. Box 71, Hanover, NH 03755

J. Tribol 123(4), 768-776 (Feb 20, 2001) (9 pages) doi:10.1115/1.1387037 History: Received October 31, 2000; Revised February 20, 2001
Copyright © 2001 by ASME
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References

Figures

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Schematic of inertial thrust bearing
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Operating mechanism of inertial thrust bearing
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Description of robust sector thrust bearing geometry
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(a) Nondimensional pressure distribution for typical high viscosity, low density operating condition; (b) nondimensional flows at typical high viscosity, low density operating condition; and (c) nondimensional pressure distribution for typical high viscosity, low density operating condition; clearance reduced by 50 percent.
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(a) Nondimensional pressure distribution for typical low viscosity, high density operating condition; (b) nondimensional flows at typical low viscosity, high density operating condition; and (c) nondimensional pressure distribution for typical low viscosity, high density operating condition; clearance reduced by 50 percent.
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Contours of nondimensional stiffness as a function of bearing number and gap Reynolds number and the path of the prototypical thrust bearing design
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Schematic of thrust bearing test facility
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Measured stiffness as a function of rotational speed
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Measured and predicted nondimensional stiffness as a function of bearing number

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