A thermohydrodynamic model is developed for predicting the three-dimensional (3D) temperature field in an air-lubricated, compliant foil journal bearing. The model accounts for the compressibility and the viscosity-temperature characteristic of air and the compliance of the bearing surface. The results of numerical solutions are compared to published experimental measurements and reasonable agreement has been attained. Parametric studies covering a fairly wide range of operating speeds and load conditions were carried out to illustrate the usefulness of the model in terms of predicting the thermal performance of foil journal bearings.
Issue Section:
Research Papers
2.
Peng
, J.-P.
, and Carpino
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, 1993, “Calculation of Stiffness and Damping Coefficients for Elastically Supported Gas Foil Bearings
,” ASME J. Tribol.
0742-4787, 115
, pp. 20
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.3.
Heshmat
, H.
, 1994, “Advancements in the Performance of Aerodynamic Foil Journal Bearings: High Speed and Load Capacity
,” ASME J. Tribol.
0742-4787, 116
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.4.
DellaCorte
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, 2000, “The Evaluation of a Modified Chrome Oxide Based High Temperature Solid Lubricant Coating for Foil Gas Bearing
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1040-2004, 43
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.5.
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, and Zeszotek
, M.
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,” Tribol. Trans.
1040-2004, 47
, pp. 470
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.7.
Howard
, S. A.
, DellaCorte
, C.
, Valco
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, and Heshmat
, H.
, 2001, “Dynamic Stiffness and Damping Characteristics of a High Temperature Air Foil Journal Bearing
,” Tribol. Trans.
1040-2004, 44
, pp. 657
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.8.
Salehi
, M.
, Swanson
, E.
, and Heshmat
, H.
, 2001, “Thermal Features of Compliant Foil Bearings—Theory and Experiments
,” ASME J. Tribol.
0742-4787, 123
, pp. 566
–571
.9.
Dykas
, B.
, and Howard
, S. A.
, 2004, “Journal Design Considerations for Turbomachine Shafts Supported on Foil Air Bearings
,” Tribol. Trans.
1040-2004, 47
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, and Chang
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.11.
Heshmat
, H.
, Walowit
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, and Pinkus
, O.
, 1983, “Analysis of Gas-Lubricated Foil Journal Bearings
,” ASME J. Lubr. Technol.
0022-2305, 105
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.12.
Heshmat
, C. A.
, Xu
, D.
, and Heshmat
, H.
, 2000, “Analysis of Gas Lubricated Foil Thrust Bearings Using Coupled Finite Element and Finite Difference Methods
,” ASME J. Tribol.
0742-4787, 122
, pp. 199
–204
.13.
Carpino
, M.
, and Peng
, J. P.
, 1991, “Theoretical Performance of Foil Journal Bearings
,” Proceedings of the AIAA/SAE/ASME/ASEE 27th Joint Propulsion Conference
, AIAA-91-2105.14.
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, M.
, and Talmage
, G.
, 2003, “A Fully Coupled Finite Element Formulation for Elastically Supported Foil Journal Bearings
,” Tribol. Trans.
1040-2004, 46
, pp. 560
–565
.15.
Peng
, Z-C.
, and Khonsari
, M. M.
, 2004, “Hydrodynamic Analysis of Compliant Foil Bearings with Compressible Air Flow
,” ASME J. Tribol.
0742-4787, 126
, pp. 542
–546
.16.
Peng
, Z-C.
, and Khonsari
, M. M.
, 2004, “On the Limiting Load-Carrying Capacity of Foil Bearings
,” ASME J. Tribol.
0742-4787, 126
, pp. 817
–818
.17.
Khonsari
, M. M.
, Jang
, J. Y.
, and Fillon
, M.
, 1996, “On the Generalization of Thermohydrodynamic Analyses for Journal Bearings
,” ASME J. Tribol.
0742-4787, 118
, pp. 571
–579
.18.
Khonsari
, M. M.
, and Esfahanian
, V.
, 1988, “Thermohydrodynamic Analysis of Solid-Liquid Lubricated Journal Bearings
,” ASME J. Tribol.
0742-4787, 110
(2
), pp. 367
–374
.19.
Ezzat
, H. A.
, and Rhode
, S. M.
, 1973, “A Study of the Thermohydrodynamic Performance of Finite Slide Bearing
,” ASME J. Lubr. Technol.
0022-2305, 95
, pp. 298
–307
.20.
Churchill
, S. W.
, and Ozoe
, H.
, 1973, “A Correlation for Laminar Free Convection from a Vertical Plate
,” ASME J. Heat Transfer
0022-1481, 95
, pp. 78
–80
.21.
Chapra
, S. C.
, and Canale
, R. P.
, 2002, Numerical Methods for Engineers
, 4th ed., McGraw-Hill
, New York, pp. 828
–829
.Copyright © 2006
by American Society of Mechanical Engineers
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