摘要
采用双椭球体的经典模型为研究对象,在8. 04Ma和10. 02Ma的工况下进行了气动热数值模拟,计算采用结构网格和非结构网格模式,分别获得了相应工况下双椭球体中心子午线上的热流密度,得到了网格模式相关性规律。计算结果表明:两种网格均与试验值热流分布趋势较为一致;非结构网格的Y+优于结构网格时,在表面大范围区域内可以获得比结构网格更优的计算结果;非结构网格在驻点处热流计算误差超过100%。该计算对高超声速飞行器的热流计算起到了重要的参考作用。
Hypersonic aerothermal simulation was conducted in Ma 8.04 and Ma 10.02 on a double ellipsoid model, and its grid dependency was investigated by means of a computational dynamic (CFD) method. The heat flux of upper and lower meridians of double ellipsoids was obtained by using structured and unstructured grids. The study demonstrates that: the results of the two grids have the same trend as that of the test heat flux;when the Y + of unstructured mesh is better than the structured mesh, the large area except the stationary point area can obtain better results than the structured mesh;and the calculation error of heat flux at stagnation point of unstructured grid exceeds 100%. The calculation plays an important role in aero heating simulation of complex hypersonic model.
作者
吕水燕
张传侠
叶坤
徐健
LYU Shuiyan;ZHANG Chuanxia;YE Kun;XU Jian(Test and Measuring Academy of China Ordnance Industries, Huayin 714200, China;School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China)
出处
《兵器装备工程学报》
CAS
北大核心
2019年第3期82-86,共5页
Journal of Ordnance Equipment Engineering
基金
国防基础科研项目(JCKY2016208A006)
