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TECHNICAL PAPERS: Gas Turbines: Vehicular and Small Turbomachines

Application of Foil Bearings to Turbomachinery Including Vertical Operation

[+] Author and Article Information
J. F. Walton, H. Hesmat

Mohawk Innovative Technology, Inc., Albany, NY 12205e-mail: jwalton@miti.cc

J. Eng. Gas Turbines Power 124(4), 1032-1041 (Sep 24, 2002) (10 pages) doi:10.1115/1.1392986 History: Received October 01, 1998; Revised March 01, 1999; Online September 24, 2002
Copyright © 2002 by ASME
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References

Emerson, T. P. 1976, “The Application of Foil Air Bearing Turbomachinery in Aircraft Environmental Control Systems,” ASME Paper No. 78-ENAS-18.
Heshmat, H., Shapiro, W, and Artiles, A., 1992, “Application of Compliant Fluid Film Bearings to the High Pressure Oxygen Turbopump of the SSME,” Proc. of Adv. Earth-to-Orbit, NASA, May 19–22.
Suriano, F. I., 1981, “Gas Lubricated Turbine End Foil Bearing Development Program,” Paper No. AFWAL-TR-81-2119.
Zorzi, E. S., and Koepsel, W. F., 1976, “Gas Lubricated Foil Bearing Development for Advanced Turbomachines,” AFAPL-TR-76-1-D14, Vols. I and II.
Heshmat, H., 1992, “Gas Lubricated Foil Bearings for Heat Pumps with Counterrotating Heat Exchangers,” ASME Paper No. 82-DET-139.
Heshmat, H., Shapiro, W., and Gray, S., 1992, “Development of Foil Journal Bearings for High Load Capacity and High Speed Whirl Stability,” ASME J. Lubr. Technol., 104 , No. 2.
Heshmat, H., and Hermel, P., 1992, “Compliant Foil Bearing Technology and Their Application to High Speed Turbomachinery,” Proc. of 19th Leeds-Lyons Symposium.
Ku, C. P. R., and Heshmat, H., 1992, “Compliant Foil Structural Stiffness Analysis, Part I: Theoretical Model,” ASME J. Tribol., 114 , No. 2.
Ku,  C. P. R., and Heshmat,  H., 1992, “Compliant Foil Structural Stiffness Analysis: Part II: Experimental Investigation,” ASME J. Tribol., 115, pp. 364–369.
Heshmat, H., Walowit, J., and Pinkus, O., 1983, “Analysis of Gas Lubricated Compliant Journal Bearings,” ASME J. Lubr. Technol., 105 , No. 4.
Heshmat, H., 1991, “Analysis of Compliant Foil Bearings with Spatially Variable Stiffness,” Paper Numbers AIAA-91-2102 and -2103.

Figures

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Elements of compliant surface bearing
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Compliant surface journal bearing types
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The hydrodynamics of rigid and compliant surface bearings
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Compliant surface thrust bearing
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Bearing construction for variable stiffness
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Mechanisms of Coulomb friction
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Hybrid hydrostatic/hydrodynamic compliant surface bearings
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Air cycle machine with compliant surface bearings
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Spectrum of industrial applications using compliant surface bearings
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Simulator for air cycle machine
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Stiffness of bearings for air cycle machine (ACM) application
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Critical speeds and damping coefficients of air cycle machine (ACM) bearings
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Log decrement of air cycle machine (ACM) bearings
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Performance characteristics of the air cycle machine (ACM) bearings
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Simulator for the cryogenic device
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Calculated critical speeds for the cryogenic rotor system
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Measured critical speeds of cryogenic rotor system
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Instantaneous and peak hold vibration plots for the cryogenic rotor system
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Peak hold coast down for the different bearing angular orientations
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Instantaneous fast Fourier transform (FFT) plots for two different bearing angular orientations
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The preloaded compliant journal bearing
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Comparison of horizontal and vertical rotor operation, Mode 1
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Comparison of horizontal and vertical coast-downs, Mode 2
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Generalized plot of rotor critical speeds for horizontal and vertical operation

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