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提高k-ωSST模型对翼型失速特性的模拟能力

, PP. 1127-1132

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Abstract:

采用CFD软件fluent,k-ωSST模型对S825翼型进行了二维数值模拟.针对k-ωSST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a1及β∞*,提高k-ωSST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.

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