计算物理 ›› 2009, Vol. 26 ›› Issue (2): 221-230.

• 研究论文 • 上一篇    下一篇

用RANS/LES混合方法研究超声速底部流动

肖志祥, 符松   

  1. 清华大学航天航空学院, 北京 100084
  • 收稿日期:2007-04-26 修回日期:2008-10-04 出版日期:2009-03-25 发布日期:2009-03-25
  • 作者简介:肖志祥(1974-),男,四川资阳,副教授,博士,主要从事飞行器气动总体设计和计算流体力学研究.
  • 基金资助:
    国家自然科学基金(No.10502030和10302015);航天创新及支撑基金资助项目

Study on Supersonic Base Flow Using RANS/LES Methods

XIAO Zhixiang, FU Song   

  1. School of Aerospace, Tsinghua University, Beijing 100084
  • Received:2007-04-26 Revised:2008-10-04 Online:2009-03-25 Published:2009-03-25

摘要: 在剪切应力输运和弱非线性k-ω模式中引入压缩性修正,并在此基础上构造RANS/LES混合方法,对包含丰富流动结构和复杂流动机理的导弹类超声速底部流场进行数值分析,发现压缩性修正可更好地描述流场特征,适于具有较强压缩性效应流动的数值分析;混合方法捕捉到丰富的流动现象及非定常特性.

关键词: 超声速底部绕流, 压缩性修正, 弱非线性模式, RANS/LES混合方法

Abstract: RANS/LES hybrid methods are developed on the basis of shear stress transport and weakly nonlinear k-ω models with compressible corrections.Supersonic flowfields behind a cylindrical afterbody are investigated to explore rich flow structures and aerodynamic characteristics.Compressible correction shows good agreement with experiment.Results by hybrid methods present detailed and reasonable flow structures,turbulence information and unsteady characteristics.

Key words: supersonic base flow, compressible correction, weakly nonlinear, RANS/LES hybrid method

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