Influence of film cooling jet inlet boundary condition on large eddy simulation of model turbine blade leading edge
by Farzad Bazdidi-Tehrani; Nima Bohlooli; Mohammad Jadidi
Progress in Computational Fluid Dynamics, An International Journal (PCFD), Vol. 15, No. 4, 2015

Abstract: The present paper investigates the influence of film cooling jet inlet boundary condition (IBC) on the large eddy simulation (LES) of film cooling in a model turbine blade with a curved leading edge. Four different IBCs comprising: 1) uniform flow; 2) time independent fully developed turbulent flow and time dependent fully developed turbulent flow perturbed by the vortex method applying two turbulence intensities of 2% and 7% are employed. Results show that accuracy of LES predictions is greatly reliant on coolant jet IBC and case (4) illustrates the best agreement with experiment whilst other cases over-predict the adiabatic effectiveness. Also, film cooling jet IBC not only has a significant influence on flow field vortical structures, but also influences the entrainment and mixing of cold and hot flows. Additionally, the capability of the vortex method for producing a time dependent IBC in leading edge film cooling application is examined and confirmed.

Online publication date: Mon, 06-Jul-2015

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