TECHNICAL PAPERS: Gas Turbines: Heat Transfer

Internal Bearing Chamber Wall Heat Transfer as a Function of Operating Conditions and Chamber Geometry

[+] Author and Article Information
Stefan Busam, Sigmar Wittig

Lehrstuhl und Institut für Thermische Strömungsmaschinen, Universität Karlsruhe (T.H.), Kaiserstr. 12, 76128 Karlsruhe, Germany

Axel Glahn

United Technologies Research Center, 411 Silver Lane, East Hartford, CT 06108

J. Eng. Gas Turbines Power 122(2), 314-320 (Jan 03, 2000) (7 pages) doi:10.1115/1.483209 History: Received March 09, 1999; Revised January 03, 2000
Copyright © 2000 by ASME
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Glahn,  A., and Wittig,  S., 1996, “Two-Phase Air Oil Flow in Aero Engine Bearing Chambers—Characterization of Oil Film Flows,” ASME J. Eng. Gas Turbines Power, 118, No. 3, pp. 578–583.
Zimmermann, H., Kammerer, A., Fischer, R., and Rebhahn, D., 1991, “Two-Phase Flow Correlations in Air/Oil Systems of Aero Engines,” ASME Paper 91-GT-54.
Wittig,  S., Glahn,  A., and Himmelsbach,  J., 1994, “Influence of High Rotational Speeds on Heat Transfer and Oil Film Thickness in Aero Engine Bearing Chambers,” ASME J. Eng. Gas Turbines Power, 116, pp. 395–401.
Glahn,  A., Kurreck,  M., Willmann,  M., and Wittig,  S., 1996, “Feasibility Study on Oil Droplet Flow Investigations inside Aero-Engine Bearing Chambers—PDPA Techniques in Combination with Numerical Approaches,” ASME J. Eng. Gas Turbines Power, 118, No. 4, pp. 749–755.
Chew, J., 1996, “Analysis of the Oil Film on the Inside of an Aero-Engine Bearing Chamber Housing,” ASME Paper 96-GT-300.
Glahn, A., and Wittig, S., 1996, “Two-Phase Air/Oil Flow in Aero-Engine Bearing Chambers—Assessment of an Analytical Prediction Model for the Internal Wall Heat Transfer,” ISROMAC-6, Honolulu, Hawaii, February 25–28, 1996.
Glahn, A., Busam, S., and Wittig, S., 1997, “Local and Mean Heat Transfer Coefficients along the Internal Housing Walls of Aero Engine Bearing Chambers,” ASME Paper 97-GT-261.
Marsal, D., 1976, “Die numerische Lösung partieller Differentialgleichungen,” Bibliographisches Institut, Zürich.


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High Speed Bearing Chamber Test Rig: (1) squeeze-film-damped roller bearing; (2) rotor; (3) ball bearing; (4) housing; (5) roller bearing support; (6) flange; (7) chamber cover; (8) under-race lubrication; (9(a,b)) three-fin labyrinth seals; and (10) vent
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Bearing Chamber Configurations and Heat Transfer Instrumentation: (a) co-axial sectional view of chamber configurations; (b) co-axial sectional view of present chamber configuration; and (c) heat transfer instrumentation survey
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Local Heat Transfer Coefficients Versus Chamber Geometry of Configuration 2 7
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Local Heat Transfer Coefficient in Chamber III, IV Versus Operating Conditions: and (a) Impact of lubrication oil flow; (b) Impact of sealing airflow; and (c) Impact of rotational speed
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Influences of the Non-Dimensional Sealing Air Flow on Averaged Nusselt Numbers
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Geometry Impact on the Correlation Coefficients
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Influences of the Non-Dimensional Lubrication Flow Rate on Averaged Nusselt Numbers
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Influences of the Circumferential Reynolds Numbers on Averaged Nusselt Numbers
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Heat Transfer Correlated With Operating Conditions



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