B-6 はく離と再付着を伴う高負荷低圧タービン翼列流れのDetached-Eddy Simulation(空力・タービン,一般講演)

概要

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This paper deals with detached-eddy simulation (DES) around low-pressure turbine (LPT) blades under two high-lift operating conditions. DES is an alternative method for large-eddy simulation (LES) in the practical high Reynolds number flows which contain some sort of the dominant unsteadiness. The main purpose of this study is an applicability assessment for DES to LPT flowfields with separation and reattachment phenomena on a suction surface of the blade. By the changing the cascade solidity, two high-lift operating conditions are examined. Among the lot of DES methods, we use the SST model based delayed DES which was proposed by Spalart. The DES results are compared with LES results on the same computational grids, previous LES results with the free-stream turbulence in a literature and the experiment.
公益社団法人日本ガスタービン学会の論文
2009-10-21