Title: On the prediction of film cooling with compound angle injection using a three-dimensional feature-based jet model

Authors: Andre Burdet, Reza S. Abhari

Addresses: Gas Turbine Business, Alstom (Switzerland) Ltd., Switzerland. ' Laboratory for Energy Conversion, Department of Mechanical and Process Engineering, Swiss Federal Institute of Technology – Zurich (ETHZ), Switzerland

Abstract: A three-dimensional feature-based jet model is proposed for the numerical simulation of film cooling flows. The modelling is made in the near hole region and model coefficients are experimentally anchored. The model previously validated for streamwise jet injection cases is modified so that compound jet injection can be simulated. The modifications of the model concern the lateral trajectory of the jet and the structural change of the coolant Counter-rotating Vortex Pair (CVP). It is shown that the modelling strategy is relevant and robust for moderate compound angle injection and that higher injection angle necessitates deeper structural change of the modelling approach.

Keywords: jet modelling; film cooling; cross flow; compound injection angle; counter-rotating vortex pair; CVP; effectiveness; numerical simulation; CFD; computational fluid dynamics.

DOI: 10.1504/PCFD.2008.019959

Progress in Computational Fluid Dynamics, An International Journal, 2008 Vol.8 No.6, pp.309 - 319

Published online: 18 Aug 2008 *

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