摘要
发展了一种基于非结构网格的自适应方法,对高超声速无粘流场进行了数值模拟。根据流场参数的变化梯度确定加密边,由加密准则进行自适应网格剖分后得到分布合理的较密网格。通过预先生成的初始极密表面网格将边界的加密点投影到边界上,使得边界保持初始外形。通过求解三维Euler方程,对三维双椭球高超声速绕流问题进行了数值模拟,计算结果和实验数据相吻合,表明了该文所建立方法的正确性和可靠性。
A method of unstructured adaptive grids was developed to simulate the inviscid hypersonic flow field. The mesh edges needed to be refined were defined based on the ratio of flow variable＇s gradients, and the finer mesh was obtained by adaptively refining the gird elements using a reasonable adaptive sensor. An initial very fine surface mesh was generated to descript the detailed shape of the calculation configuration, and the refined mesh points of boundary grid elements were reasonably disposed on the surface of configurations by using the initial very fine surface mesh, and the original shape of the configuration was kept after refinement operations. The three dimensional Euler equations were solved to numerically simulate the hypersonic flow around the double-ellipsoid configuration, and the calculation results agreed well with the experimental data. It was demonstrated that the presented method of unstructured adaptive grid technology is reasonable and effective for simulating the hypersonic flow field.
出处
《工程力学》
EI
CSCD
北大核心
2012年第3期226-229,236,共5页
Engineering Mechanics
基金
重点实验室基金项目(9140C42010210ZS51)
