北京航空航天大学学报 ›› 2011, Vol. 37 ›› Issue (9): 1095-1099.

• 论文 • 上一篇    下一篇

LES/RANS混合方法对超声速底部流动的应用

高瑞泽, 阎超   

  1. 北京航空航天大学 航空科学与工程学院, 北京 100191
  • 收稿日期:2010-05-06 出版日期:2011-09-30 发布日期:2011-10-03
  • 作者简介:高瑞泽(1981-),男,山东淄博人,博士生,grz720000@vip.sina.com.
  • 基金资助:

    国家重点基础研究发展计划资助项目 (2009CB724104)

LES/RANS hybrid method for supersonic axisymmetric base flow

Gao Ruize, Yan Chao   

  1. School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2010-05-06 Online:2011-09-30 Published:2011-10-03

摘要: 为克服大涡模拟(LES,Large Eddy Simulation)对近壁区域使用的局限,近年来LES/RANS(Reynolds Averaged Navier-Stokes)混合方法成为研究热点,利用LES与RANS两者自身的优点克服对方的不足,有效实现计算精度和效率的统一.基于LES/RANS混和方法,采用Smagorinsky-BL(Baldwin-Lomax)模型和新型Vreman-BL模型,对超音速底部流动这一难题进行了模拟,分析了其流场结构.计算结果表明:得到的速度型、底面压力分布与实验值吻合,优于雷诺平均方法的结果.

Abstract: To overcome the limitation of large eddy simulation(LES) for wall problem, LES/RANS hybrid method was investigated in recent years,which not only combined the advantages of LES and RANS but also avoided the disadvantages of each other. Base flow is a difficult problem in CFD. Based on LES/RANS hybrid method, Smagorinsky-BL model and a new Vreman-BL model were applied to an axisymmetric base flow at supersonic conditions. The obtained base flow structure was analyzed in comparison with experimental data. The results show that predictions of velocity, pressure distribution, velocity and pressure distributions of base flows using hybrid method compare well with experimental data.

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