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中文摘要：
采用CFD软件fluent，k-ω SST模型对$825翼型进行了二维数值模拟．针对k-ω SST模型对翼型分离失速特性模拟不准的情况，对分离区域内湍流的强非平衡输运特性进行了分析．研究表明：原始模型由于不能准确模拟分离区内湍流的强非平衡输运特性，导致其对翼型失速特性模拟失效；提出了通过修正模型系数α1及 β∞＊提高k-ω SST模型预测非平衡湍流输运特性的方法，从而提高对翼型失速特性的模拟精度．
英文摘要：
Two-dimensional numerical simulations of NREL airfoil S825 with k-toSST turbulence model were conducted. For the k-ω SST turbulence model could not predict the airfoil aerodynamic performance accurately at stall conditions, the non-equilibrium turbulence transport nature was systematically analyzed. It was found that ： the mis-predicting of the stall characteristics was due to the fact that the tradition turbulence model could not accurately predict the strongly non-equilibrium turbulence transport nature. Correcting the constant α1 or β∞＊ could improves obviously the capability of prediction stall characteristics of k-ω SST turbulence model,because by giving a more reasonable turbulence transport nature, the capability of k-ω SST model in capturing the non-equilibrium turbulence was improved notably.
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