细长体背风面横向非对称分离的研究  

THE INVESTIGAION OF ASYMMETRIC SEPARAION ON SLENDER BODY

作　　者：李锋[1] 周伟江[1] 王强[1] 汪翼云[1] 

机构地区：[1]北京空气动力研究所

出　　处：《力学学报》1995年第S1期114-119,共6页Chinese Journal of Theoretical and Applied Mechanics

摘　　要：用数值模拟方法研究了超声速情况下，无限长细长体背风面的涡结构。数值模拟的出发方程和计算格式分别为全Ｎ－Ｓ方程和二阶空间精度的ＴＶＤ格式。数值结果给出了圆锥、半球柱体和椭圆锥在不同攻角下的流场结果。结果表明圆锥在攻角α＝１５°，２０°和２５°时背风面呈现明显的稳定非对称横向分离，而半球柱体和椭圆锥在３２．５°和２５°时背风面均未出现非对称的横向分离结构。Vortex structure on the slender bodies at supsonic flow is investigated by numer-ical method.The Navier-Stokes equations and TVD scheme are applied for the numerical simulation.The results present some characteristics of flow over the slender cone,hemi-spheric cylinder and elliptic cone and show that within the range of angle 1 5° 25°,the asymmetric vortices are formed on the leeside of slender cone and no asymmetric vortices are found for the hemisphere cylinder or elliptic cone at angle of attack of 32.5° and 25°respectively.

关 键 词：非对称分离 细长体 大攻角流动 数值模拟 

分 类 号：O354[理学—流体力学]