Systematic Investigation on Conjugate Heat Transfer Rates of Film Cooling Configurations

Author:

Bohn Dieter1,Ren Jing1,Kusterer Karsten2

Affiliation:

1. Institute of Steam and Gas Turbines, Aachen University, Templergraben 55, Aachen 52056, Germany

2. B&B-AGEMA, Gesellschaft für Energietechnische Maschinen und Anlagen GmbH, Jülicher StraB 338, Aachen 52070, Germany

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.

Publisher

Hindawi Limited

Subject

Industrial and Manufacturing Engineering,Mechanical Engineering

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