| 三角翼大迎角非对称旋涡破裂数值模拟 |
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| 引用本文： | 肖志祥,陈海昕,符松,李凤蔚.三角翼大迎角非对称旋涡破裂数值模拟[J].计算物理,2005,22(3):221-226. |
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| 作者姓名： | 肖志祥 陈海昕 符松 李凤蔚 |
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| 作者单位： | 清华大学,工程力学系,北京,100084;西北工业大学,航空学院,陕西,西安,710072;清华大学,工程力学系,北京,100084;西北工业大学,航空学院,陕西,西安,710072 |
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| 基金项目： | 中国博士后科学基金，国家自然科学基金(10477012)资助项目 |
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| 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.
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| 关 键 词： | 伪时间子迭代格式 LU-SGS方法 非对称旋涡破裂 |
| 文章编号： | 1001-246X(2005)03-0221-006 |
| 收稿时间： | 2004-02-19 |
| 修稿时间： | 2004年2月19日 |
Asymmetrical Vortex Breakdown of Delta Wings at High Incidence |
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| XIAO Zhi-xiang,CHEN Hai-xin,Fu Song,Li Feng-wei.Asymmetrical Vortex Breakdown of Delta Wings at High Incidence[J].Chinese Journal of Computational Physics,2005,22(3):221-226. |
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| Authors: | XIAO Zhi-xiang CHEN Hai-xin Fu Song Li Feng-wei |
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| Institution: | 1. Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;2. College of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China |
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| 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. |
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| Keywords: | pseudo time sub-iteration LU-SGS method asymmetrical vortex breakdown |
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