叶栅内冷气射流场结构的数值模拟  

Numerical Simulation of Coolant Jet Structure in Turbine Cascade

作　　者：王松涛[1] 冯国泰[1] 王仲奇[1] 

机构地区：[1]哈尔滨工业大学241教研室,黑龙江哈尔滨150001

出　　处：《航空动力学报》2000年第3期274-277,共4页Journal of Aerospace Power

基　　金：教育部博士点基金资助项目!( 970 2 13 0 5 )

摘　　要：采用具有 TVD性质的三阶精度 Godunov格式对涡轮叶栅背弧表面进行了冷气喷射的数值模拟。射流由冷气孔喷出后在空间的发展过程中逐渐形成典型的卵形涡对 ,在压力场的作用下射流被压弯并逐渐向背弧表面靠拢。射流在出口附近具有刚体的特性 ,并在射流前方形成了鞍点及马蹄涡。同时本文还验证了大冷气喷射速率条件下 ,卵形涡消失于主流而非边界层内的结论。The structure of coolant jet from suction surface of turbine cascade was simulated with N S solver.Governing equation was discreted with third order Godunov scheme which has TVD property.The kidney shape vortex was generated gradually during the mixing process between coolant jet and main flow.The coolant jet bent to suction surface gradually due to the pressure gradient from pressure surface to suction surface.The dimension of kidney shape vortex increased while its strength decreased gradually during coolant jet development.A saddle point and horse shoe vortex were formed in the front of the hole because of the rigid body character of coolant jet near the hole.It is also testified that the kidney shape vortex disappeared in main flow instead of boundary surface under the condition of large coolant jet velocity.

关 键 词：叶栅 流场结构 数值模拟 冷气喷射 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]