| 复杂外形飞行器热流的NND有限元数值计算方法 |
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| 引用本文： | 石清,李桦.复杂外形飞行器热流的NND有限元数值计算方法[J].空气动力学学报,2009,27(2). |
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| 作者姓名： | 石清 李桦 |
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| 作者单位： | 1. 中国空气动力研究与发展中心,四川,绵阳,621000;国防科学技术大学航天与材料工程学院,湖南,长沙,410073
2. 国防科学技术大学航天与材料工程学院,湖南,长沙,410073 |
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| 摘 要： | 有限元方法是一种加权积分的方法,其特点和权函数的特性使得有限元方法对于复杂外形的边界处理和计算诸如热流(与温度的一阶导数相关)等物理量时有其内在的优越性.本文采用张涵信的NND思想发展了复杂流场的NND有限元计算方法,算例表明,在相同的网格雷诺数下,采用积分的方法提高了物体表面热流的计算精度,对高超声速复杂外形飞行器的绕流获得了良好的数值模拟结果.
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| 关 键 词： | 复杂外形 热流 有限元 |
The researches on the NND finite element method and its applications in predicting the heat transfer rate around complicated configurations |
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| SHI Qing,LI Hua.The researches on the NND finite element method and its applications in predicting the heat transfer rate around complicated configurations[J].Acta Aerodynamica Sinica,2009,27(2). |
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| Authors: | SHI Qing LI Hua |
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| Institution: | 1.China Aerodynamics Research and Development Center;Mianyang Sichuan 621000;China;2.College of Aerospace and Material Engineering;National University of Defense Technology;Changsha 410073;China |
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| Abstract: | Finite element method is a weighted integration approach,and it is more suitable than finite difference methods to predict a comparatively accurate heat rate on the body surface.The calculation of heat flux over complex configurations by means of the NND finite element method is investigated.In order to achieve high resolution near the strong discontinuities without spurious fluctuations,an explicit non-oscillatory,non-free-parameter and dissipative finite element scheme is proposed,by using the flux splitt... |
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| Keywords: | hypersonic flow complex configuration heat flux finite element method |
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