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International Journal of Rotating Machinery
Volume 2005, Issue 3, Pages 211-220
http://dx.doi.org/10.1155/IJRM.2005.211

Systematic Investigation on Conjugate Heat Transfer Rates of Film Cooling Configurations

1Institute of Steam and Gas Turbines, Aachen University, Templergraben 55, Aachen 52056, Germany
2B&B-AGEMA, Gesellschaft für Energietechnische Maschinen und Anlagen GmbH, Jülicher StraB 338, Aachen 52070, Germany

Received 4 March 2005

Copyright © 2005 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

For the determination of the film-cooling heat transfer, the design of a turbine blade relies on the conventional determination of the adiabatic film-cooling effectiveness and heat transfer conditions for test configurations. Thus, additional influences by the interaction of fluid flow and heat transfer and influences by additional convective heat transfer cannot be taken into account with sufficient accuracy. Within this paper, calculations of a film-cooled duct wall and a film-cooled real blade with application of the adiabatic and a conjugate heat transfer condition have been performed for different configurations. It can be shown that the application of the conjugate calculation method comprises the influence of heat transfer within the cooling film. The local heat transfer rate varies significantly depending on the local position.