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ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

3-D NUMERICAL AERODYNAMIC AND COMBINED HEAT TRANSFER ANALYSIS OF A TURBINE GUIDE VANE WITH SHOWERHEAD EJECTION

Get access (open in a dialog) DOI: 10.1615/IHTC11.3870
pages 313-318

Abstract

The cooling configuration investigated in this paper is a turbine guide vane with showerhead ejection through two rows of cooling holes, one row on the suction side and the other on the pressure side, in the vicinity of the stagnation line. The interaction of the cooling gas ejection and the main flow at the leading edge is investigated in detail. Within a secondary flow analysis it can be shown that complex vortex systems are formed in the cooling fluid jets. These vortex systems include the kidney vortices which lead to single cooling jets along the entire vane, instead of forming a continuous cooling film.
Furthermore, a combined investigation of the heat transfer and fluid flow is performed using a conjugate calculation method. This code allows the prediction of the fluid flow properties and wall temperatures without the need for additional heat transfer boundary conditions at the external surfaces of the vane. A realistic temperature ratio of the cooling fluid flow and the hot gas flow is assumed. The results show the influence of secondary flow phenomena and inhomogeneous cooling fluid distributions on the wall temperatures.