| 多段翼型大迎角分离流动的DELAYED RANS/LES混合算法 |
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| 引用本文： | 宋科,乔志德. 多段翼型大迎角分离流动的DELAYED RANS/LES混合算法[J]. 航空计算技术, 2009, 39(3): 42-47,55 |
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| 作者姓名： | 宋科 乔志德 |
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| 作者单位： | 西北工业大学,翼型叶栅国防科技重点实验室,陕西,西安,710072;西北工业大学,翼型叶栅国防科技重点实验室,陕西,西安,710072 |
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| 摘 要： | 多段翼型的大迎角绕流发生大范围附面层分离,具有明显的三维与非定常流动特性。RANS/LES混合算法继承了LES对流动分离区大尺度漩涡准确模拟的优点,避免了纯LES算法需求网格量巨大与亚格子模型壁面函数不成熟等问题,对分离流动的模拟效果优于RANS算法。以S-A湍流模型与Smagorinsky亚格子模型为基础,借鉴DDES的附面层延迟控制思想,构造了可用于对接网格、重叠网格的DELAYED RANS/LES混合算法。研究了GA（W）-1多段翼型的大迎角分离流动及其气动特性。
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| 关 键 词： | DELAYED RANS/LES混合算法 Smagorinsky模型 多段翼型 大迎角 分离流动 |
DELAYED RANS/LES Method For High Attack Angle Flow over Multi-element Airfoil |
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| SONG Ke,QIAO Zhi-de. DELAYED RANS/LES Method For High Attack Angle Flow over Multi-element Airfoil[J]. Aeronautical Computer Technique, 2009, 39(3): 42-47,55 |
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| Authors: | SONG Ke QIAO Zhi-de |
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| Affiliation: | (National Key Laboratory of Aerodynamic Design and Research,Northwestern Polytechnical University ,Xi＇an 710072,China) |
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| Abstract: | The massively separated flows over multi-element airfoil are three-dimensional and time-dependent.RANS/LES Hybrid method combines the power of RANS in the attached boundary layers with the power of LES in separated flow regions.Hybrid Method computation of massively separated flows is superior to RANS.In this paper,an improved Hybrid Method based on S-A turbulence model and Smagorinsky SGS model,DELAYED RANS/LES is implemented on both point-to-point multiblock grid and overset grid.With these methods,the ma... |
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| Keywords: | DELAYED RANS/LES multi-element airfoil hight attack angle separated flows |
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