柯恩达表面形状对环量控制涡轮叶型性能影响  

Effect of Coanda Surface Shape on the Performance of Circulation Control Turbine Cascade

作　　者：宋彦萍[1] 陈焕龙[1] 李亚超[1] 陈浮[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《工程热物理学报》2012年第1期43-46,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50876023);高等学校博士学科点专项科研基金资助项目(No.200802130017)

摘　　要：采用商业软件ANSYS CFX研究了具有圆形和椭圆形柯恩达表面的环量控制叶型在不同射流速度下的流场和性能。结果表明:小的射流速度和大的柯恩达表面型线曲率是导致射流分离的主要因素,采用高速射流绕流大曲率柯恩达表面能够获得较大气流角和膨胀比,但同时带来较大的能量损失,叶栅气动性能与柯恩达表面形状和射流条件密切相关。The idea of application of Coanda effect to gas turbine was proposed and studied in the paper. The performance of circulation control cascade with different Coanda surfaces was obtained through 2-D numerical simulation. The results show that high-speed jet flowing over the Coanda surface with a large curvature brings a high flow angle and expansion ratio as well as a high energy loss. Jet detachment occurs when a low-speed jet flows around the Coanda surface with a large curvature. The aerodynamic performance of the cascade is closely related to the Coanda surface shape and the jet condition.

关 键 词：燃机涡轮 环量控制叶型 柯恩达表面形状 射流速度 

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]