Systematic Investigation on Conjugate Heat Transfer Rates of Film Cooling Configurations

• Main Authors: Dieter Bohn, Jing Ren, Karsten Kusterer
• Format: Article
• Language: English
• Published: Hindawi Limited 2005-01-01
• Series: International Journal of Rotating Machinery
• Subjects: film cooling; shaped holes; conjugate heat transfer; secondary flows; specific heat rate.
• Online Access: http://dx.doi.org/10.1155/IJRM.2005.211

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.