弯叶片对大转角平面涡轮叶栅气动性能影响的实验研究  

Experimental Investigation of the Aerodynamic Performance of Bowed Blades in High-turning Linear Turbine Cascades

作　　者：谭春青[1] 张华良[1] 陈海生[1] 赵洪雷[1] 董学智[1] 山本孝正 

机构地区：[1]中国科学院工程热物理研究所,北京100190 [2]日本宇宙航空研究开发机构,东京182-85220

出　　处：《燃气涡轮试验与研究》2009年第1期8-12,共5页Gas Turbine Experiment and Research

基　　金：国家自然科学基金资助项目(No:10577019)

摘　　要：本文选择叶型折转角为113°的平面涡轮叶栅,开展了直叶栅、正/反弯曲叶栅的流场测量和流动显示研究,讨论了叶片弯曲对壁面流谱、静压分布以及流动损失的影响。结果表明:对于大折转角(113°)平面涡轮叶栅,叶片反弯(DHN)使得叶栅流场明显恶化,叶栅损失增加;叶片正弯(DHP)则在一定程度上减少流动损失,但效果没有普通小折转角的涡轮叶栅明显。An experimental investigation was performed to analyze the effect of bowed blade on the flow patterns, distributions of static pressure as well as the secondary flow loss of the turbine cascades with a turning angle of 113 degree through flow field measurement and flow visualization. The results show that a negatively bowed blade can increase markedly the energy loss of the cascade with a turning angle of 113 degree, whereas, an appropriate positively bowed blade can reduce the flow loss. However the improvement of cascade performance for positively bowed blade is not distinct in comparison with the normal cascades with low turning angles.

关 键 词：大折转角 涡轮叶栅 流动分离 弯叶片 

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]