| 非结构化网格下二维钝头体绕流DSMC数值模拟 |
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| 引用本文： | 李学东,王保国. 非结构化网格下二维钝头体绕流DSMC数值模拟[J]. 兵工学报, 2010, 0(Z1) |
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| 作者姓名： | 李学东 王保国 |
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| 作者单位： | 北京理工大学宇航学院; |
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| 基金项目： | 国家自然科学基金(50376004) |
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| 摘 要： | 本文采用非结构化三角网格为基本网格单元,应用DSMC(直接模拟蒙特卡罗法)方法对超声速稀薄气体钝头体绕流问题进行数值模拟。对不同Knudsen数和不同Mach数下的绕流问题进行数值模拟,得到在高空稀薄气体区域飞行器外部流场变化的一些基本规律。结果表明:随着Knudsen数的增加,激波减弱,激波层厚度增大,激波位置远离钝体表面,壁面热流密度减小;在相同的Knudsen数下,随来流的速度增加,壁面热流密度增大。这些模拟结果对有效的完成飞行器热防护具有十分重要的意义。
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| 关 键 词： | 流体力学 DSMC 钝头体绕流 非结构化网格 激波 |
DSMC Numerical Simulation for Flow around 2-D Blunt Bodies with Unstructured Grid |
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| LI Xue-dong,WANG Bao-guo. DSMC Numerical Simulation for Flow around 2-D Blunt Bodies with Unstructured Grid[J]. Acta Armamentarii, 2010, 0(Z1) |
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| Authors: | LI Xue-dong WANG Bao-guo |
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| Affiliation: | LI Xue-dong,WANG Bao-guo(School of Aerospace,Beijing Institute of Technology,Beijing 100081,China) |
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| Abstract: | The supersonic rarefied gas flow around blunt bodies was studied numerically by direct simulation Monte-Carlo(DSMC) method and taking unstructured triangular grid as basic grid unit.The flow problems with the different Knudsen numbers and Mach numbers were analyzed to obtain the change patterns of the outer flow field of flight vehicles in the rarefied air.The simulated results show that,with the increase of Knudsen number from 0.02 to 2,the shock wave weakens,the shock wave layer's thickness increases,the ... |
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| Keywords: | hydromechanics DSMC flow past blunt bodies unstructured grid shock wave |
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