计算物理 ›› 2005, Vol. 22 ›› Issue (3): 221-226.

• 研究论文 • 上一篇    下一篇

三角翼大迎角非对称旋涡破裂数值模拟

肖志祥1,2, 陈海昕1, 符松1, 李凤蔚2   

  1. 1. 清华大学工程力学系, 北京 100084;
    2. 西北工业大学航空学院, 陕西 西安 710072
  • 收稿日期:2004-02-19 修回日期:2004-06-22 出版日期:2005-05-25 发布日期:2005-05-25
  • 作者简介:肖志祥(1974-),男,四川资阳,博士后,主要从事计算流体力学研究.
  • 基金资助:
    中国博士后科学基金及国家自然科学基金(10477012)资助项目

Asymmetrical Vortex Breakdown of Delta Wings at High Incidence

XIAO Zhi-xiang1,2, CHEN Hai-xin1, FU Song1, LI Feng-wei2   

  1. 1. Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;
    2. College of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2004-02-19 Revised:2004-06-22 Online:2005-05-25 Published:2005-05-25

摘要: 采用由伪时间子迭代格式实现的二阶精度LU SGS方法进行时间推进,并以Jameson中心加人工粘性格式进行空间离散,应用层流假设和Baldwin Lomax(B-L)模式,求解雷诺平均的薄层Navier Stokes(N-S)方程组以模拟细长三角翼大迎角流动.为验证本方法,首先计算了具备实验数据的65°后掠角三角翼大迎角流场,获得令人满意的结果;然后模拟了80°后掠角的细长三角翼,研究其大迎角非对称旋涡破裂特性.

关键词: 伪时间子迭代格式, LU-SGS方法, 非对称旋涡破裂

Abstract: A fully implicit Lower-Upper-Symmetric-Gauss-Seidel (LU-SGS) with pseudo time sub-iteration and the modified Jameson's central scheme are applied to solve thin layer Navier-Stokes(N-S) equations with laminar hypothesis and Baldwin-Lomax(B-L) model for the vortical flows around delta wings at high angles of attack (AOA).To validate the codes,a 65 degree swept delta wing is computed in transonic cases,where M=0.85,α=10°,20° and Re=5×106.Then asymmetrical vortex breakdown flows with M=0.3,and Re=1.3×106,at high AOA around an 80° swept delta wing are presented and discussed.The computational results are compared with experimental data available and good agreement is achieved.

Key words: pseudo time sub-iteration, LU-SGS method, asymmetrical vortex breakdown

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