计算物理 ›› 2006, Vol. 23 ›› Issue (3): 355-360.

• 研究论文 • 上一篇    下一篇

混合通量差分格式的比较

段毅, 杨永   

  1. 西北工业大学 翼型叶栅空气动力学国防科技重点实验室, 陕西 西安 710072
  • 收稿日期:2004-12-14 修回日期:2005-07-11 出版日期:2006-05-25 发布日期:2006-05-25
  • 作者简介:段毅(1977-),男,陕西韩城,博士,主要从事计算流体力学研究.

A Comparison of Hybrid Flux Difference Schemes

DUAN Yi, YANG Yong   

  1. National Key Laboratory of Aerodynamic Design and Research, Northwestern Polytechanical University, Xi'an 710072, China
  • Received:2004-12-14 Revised:2005-07-11 Online:2006-05-25 Published:2006-05-25

摘要: 系统研究了几种混合通量差分格式的构造方法和耗散模型,分别对低速平板绕流、二维跨音速喷管流动和高超音速钝头体无粘绕流进行了数值模拟,结合先进的EASM湍流模型对格式的粘性分辨率和激波稳定性进行了细致的比较分析.结果表明混合通量差分格式兼顾了FDS和FVS格式的优点,具有较高的间断分辨率和数值稳定性.

关键词: 混合通量差分格式, 耗散模型, EASM, 分辨率

Abstract: The building mechanism and artifical dissipation models of hybrid flux difference schemes are analyzed. The explicit algorithm turbulent model (EASM) is combined with the Reynolds average N-S equations to simulate turbulent flows. Resolution and robustness near shock discontinuities are investigated with low speed laminar/turbulent flows over a flat plate, transonic convergence-divergence diffuser flows and hypersonic inviscid flows over blunt-nose body. Compared with experimental data it shows that the hybrid flux difference schemes obtain similar resolution as a Roe-FDS scheme, and are free of non-physical numerical solutions as FVS schemes.

Key words: hybrid flux difference, dissipation models, EASM k-ω, resolution

中图分类号: