Hydrodynamic Analysis of Compliant Foil Bearings With Compressible Air Flow

[+] Author and Article Information
Z.-C. Peng, M. M. Khonsari

Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803

J. Tribol 126(3), 542-546 (Jun 28, 2004) (5 pages) doi:10.1115/1.1739242 History: Received April 23, 2003; Revised September 11, 2003; Online June 28, 2004
Copyright © 2004 by ASME
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Schematics of a foil bearing
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The compliant support of a foil bearing
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Hydrodynamic pressure of a “1st generation” bearing at 45,000 rpm under 210 N. (θ is reversed to show the sub-ambient pressure.)
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Simulated load performance of a “1st generation” bearing compared with experimental data
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Converged film thickness (operating speed=30,000 rpm, hmin=10.5 μm) of a “1st generation” bearing
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The mid-plane pressure of a “1st generation” foil bearing compared with that of a rigid bearing
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Increasing film thickness with increasing speeds for a given minimum film thickness
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The predicted pressure of a “3rd generation” foil bearing at 29,700 rpm (C=40 μm and hmin=6 μm). The corresponding load matches the experimental load of 282 N 2.
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Comparison of attitude angles between rigid bearing and foil bearing




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