细长体大攻角分离流动的数值模拟研究  

Numerical simulation of the asymmetric flow field around inclined ogive cylinders

作　　者：胡汉东[1] 邓学蓥[2] 杨其德[1] 

机构地区：[1]中国空气动力研究与发展中心总体技术部,四川绵阳621000 [2]北京航空航天大学流体所,北京100086

出　　处：《空气动力学学报》2007年第B12期63-66,共4页Acta Aerodynamica Sinica

摘　　要：采用数值模拟方法研究了具有头部微小扰动细长旋成体大攻角分离流动。考察了全层流和全湍流情况下头部扰动位置和大小对背风面流动和截面侧向力的影响。结果显示：在给定的扰动形式下，层流和湍流背风面流动存在明显的双稳态特征，侧向力随扰动周向位置呈双周期变化；扰动大小对层流流动的影响明显大于对湍流流动的影响。Numerical simulation of the asymmetric flow field around an inclined ogive cylinder with manual perturbations attached to the nose has been done in laminar flow and in turbulent flow. The result shows that bistable asymmetric vortices exist in both laminar flow and turbulent flow under the given manual perturbations, and the azimuthal location of manual perturbation has a dominant effect on the structure and behaviors of bistable asymmetric vortices that make the side force into two-cycle variation per 360^o of roll. Numerical simulation also shows that the size of manual perturbations exhibits more influence on the sectional side force in laminar flow then in turbulent flow.

关 键 词：雷诺数 细长体 非对称涡流动 数值模拟 

分 类 号：V212.3[航空宇航科学与技术—航空宇航推进理论与工程]