考虑旋转效应的三维分离流动判别准则  

Three dimensional flow criterion of separation with rotation effects

作　　者：张宝宁[1] 张扬军[1] 孟庆国 罗建曦[1] 

机构地区：[1]清华大学汽车工程系汽车安全与节能国家重点实验室,北京100084 [2]国家自然科学基金委数理学部,北京100083

出　　处：《清华大学学报（自然科学版）》2002年第2期254-257,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目 ( 1980 2 0 11)

摘　　要：通过探讨主流对壁面流动特性的影响 ,研究三维流动侧向压力梯度产生的边界层内二次流动 ,求解旋转正交曲线坐标系下的边界层方程 ,理论推导出考虑旋转效应的三维分离流动判别准则 ,该判别准则包含了壁面与轴向间夹角的影响 ,根据主流参数的变化判断流动是否发生分离。应用推导出的判别准则研究了旋转角速度。The performance of turbomachinery is often controlled by flow separation at off design conditions due to the large energy losses associated with boundary layer separation. A 3 D criterion was developed to predict incipient three dimensional separation in turbomachinery by correlating the main flow and the boundary layer flow. The effects of rotation and blade curvature were discussed using the criterion in axial turbomachinery blade passage. Rotation retards separation in the passages between slanted or bent blades. The effects of the lean and curvature of the blades on flow separation depend on main flow velocity, radius, and other parameters.

关 键 词：三维分离流动 二次流动 侧向压力梯度 边界层方程 旋转效应 叶轮机械 判别准则 

分 类 号：O357.1[理学—流体力学]