| CFD-FASTRAN气动热计算模型及网格效应分析 |
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| 引用本文： | 董素君,居世超,齐玢,吴俊,雷剑.CFD-FASTRAN气动热计算模型及网格效应分析[J].航空计算技术,2011,41(2):40-42. |
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| 作者姓名： | 董素君 居世超 齐玢 吴俊 雷剑 |
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| 作者单位： | 1. 北京航空航天大学,航空科学与工程学院,北京,100191
2. ESI-ATE北京办事处,北京,100027 |
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| 摘 要： | 介绍了CFD-FASTRAN软件五种湍流模型。通过B-L湍流模型不同网格气动热计算结果的对比分析,说明近壁面第一层网格间距须保证y＋值处于所选湍流模型要求值范围的1/3左右,才能保证计算结果的准确性。进一步通过直二次圆锥形不同湍流模型计算与试验的对比结果,说明CFD-FASTRAN软件的k-ε及B-L两种模型求解高超声速气动热问题能达到较好的准确性,且B-L模型计算速度快、使用方便,更适宜于整机大型数值计算。
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| 关 键 词： | 数值模拟 湍流模型 网格 CFD-FASTRAN |
Model and Grid Dependency of Hypersonic Aerodynamic Heating Calculation Accuracy by CFD-FASTRAN Software |
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| DONG Su-jun,JU Shi-chao,QI Bin,WU Jun,LEI Jian.Model and Grid Dependency of Hypersonic Aerodynamic Heating Calculation Accuracy by CFD-FASTRAN Software[J].Aeronautical Computer Technique,2011,41(2):40-42. |
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| Authors: | DONG Su-jun JU Shi-chao QI Bin WU Jun LEI Jian |
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| Institution: | (School of Aeronautic Science and Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100191,China;ESI-ATE Holdings Limited Beijing Office,Beijing 10027,China) |
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| Abstract: | Five turbulent models of CFD-FASTRAN software are introduced.The hypersonic aerodynamic heating calculation results by Baldwin-Lomax turbulent model of different grid scale shows that the wall-closest grid interval should make the y+ value approximate to one third of the upper limit prescribed by turbulent model.Then,the comparison of the hypersonic aerodynamic heating calculation results by different turbulent model of CFD-FASTRAN software and the test data of a bi-conic shows that the k-ε and B-L turbulent model of this software can give a result accurate enough,and the B-L turbulent model can calculate more quickly and be competent for large scale calculation of a whole aircraft. |
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| Keywords: | numerical calculation turbulent model grid CFD-FASTRAN |
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