J0501-1-3 低レイノルズ数条件下における高負荷低圧タービン翼列流れのDetached-Eddy Simulation([J0501-1]流体機械の研究開発におけるEFD/CFD(1))

概要

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In this paper, SST turbulence model based Detached-eddy simulation (DES) for a low-pressure turbine is examined. The flow condition is a low Reynolds number condition, 5.7×10^4 and a highly loading. In this flowfield, the roll-up of the separated shear layer above the blade suction surface is observed. Before the roll-up, the shear layer keeps the two-dimensionality. After that, the shear layer breaks down and becomes many small parts. In order to predict such flowfield which contains large separation and reattachment in a low-pressure turbine blade, the detailed comparisons between the experimental data and the simulation results are studied. The experimental data is obtained by our research group. The DES result is also compared with two types of LES calculations. The discussion of this paper focuses the turbulence intensity profile in the boundary layer developed on the blade suction surface.
2010-09-04