In this paper a three-dimensional conjugate calculation has been performed for a passenger car turbo charger. The scope of this work is to investigate the heat fluxes in the radial compressor, which can be strongly influenced by the hot turbine. As a result of this, the compressor efficiency may deteriorate. Consequently, the heat fluxes have to be taken into account for the determination of the efficiency. To overcome this problem a complex three-dimensional model has been developed. It contains the compressor, the oil cooled center housing, and the turbine. Twelve operating points have been numerically simulated composed of three different turbine inlet temperatures and four different mass flows. The boundary conditions for the flow and for the outer casing were derived from experimental test data (Bohn et al.). Resulting from these conjugate calculations various one-dimensional calculation specifications have been developed. They describe the heat transfer phenomena inside the compressor with the help of a Nusselt number, which is a function of an artificial Reynolds number and the turbine inlet temperature.
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July 2005
Technical Papers
Conjugate Flow and Heat Transfer Investigation of a Turbo Charger
Dieter Bohn,
Dieter Bohn
Institute of Steam and Gas Turbines, Aachen University of Technology, Templergraben 55, D-52056 Aachen, Germany
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Tom Heuer,
Tom Heuer
Borg Warner Turbo Systems GmbH, Marnheimer Str. 85/87, D-67292 Kirchheimbolanden, Germany
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Karsten Kusterer
Karsten Kusterer
B&B-AGEMA, Gesellschaft fu¨r Energietechnische Maschinen und Anlagen GmbH, Ju¨licher Str. 338, D-52070 Aachen, Germany
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Dieter Bohn
Institute of Steam and Gas Turbines, Aachen University of Technology, Templergraben 55, D-52056 Aachen, Germany
Tom Heuer
Borg Warner Turbo Systems GmbH, Marnheimer Str. 85/87, D-67292 Kirchheimbolanden, Germany
Karsten Kusterer
B&B-AGEMA, Gesellschaft fu¨r Energietechnische Maschinen und Anlagen GmbH, Ju¨licher Str. 338, D-52070 Aachen, Germany
Contributed by the International Gas Turbine Institute (IGTI) of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Paper presented at the International Gas Turbine and Aeroengine Congress and Exhibition, Atlanta, GA, June 16–19; 2003, Paper No. 2003-GT-38445. Manuscript received by IGTI, Oct. 2002, final revision, Mar. 2003. Associate Editor: H. R. Simmons.
J. Eng. Gas Turbines Power. Jul 2005, 127(3): 663-669 (7 pages)
Published Online: June 24, 2005
Article history
Received:
October 1, 2002
Revised:
March 1, 2003
Online:
June 24, 2005
Citation
Bohn, D., Heuer, T., and Kusterer, K. (June 24, 2005). "Conjugate Flow and Heat Transfer Investigation of a Turbo Charger ." ASME. J. Eng. Gas Turbines Power. July 2005; 127(3): 663–669. https://doi.org/10.1115/1.1839919
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