叶片正弯曲对涡轮静叶栅流场影响的试验研究  

EXPERIMENTAL INVESTIGATION ON THE EFFECTS OF POSITIVE BOWED BLADES ON THE FLOW FIELDS IN TURBINE STATOR CASCADE

作　　者：谭春青[1] 陈海生[1] 康顺[1] 蒋洪德[1] 蔡睿贤[1] 梁锡智[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100080

出　　处：《机械工程学报》2001年第7期47-50,55,共5页Journal of Mechanical Engineering

基　　金：中国博士后科学基金;国家攀登B计划第 48;中科院院长青年创新基金;中科院百人计划及国家杰出青年基金资助项目(5 982 5 10 3 )

摘　　要：对一典型涡轮静叶型开展了叶片正弯曲对涡轮叶栅流场性能影响的试验研究。测量了直叶栅和 +10°、+2 0°、+30°弯曲叶片叶栅出口流场。结果表明 ,对该叶型叶栅 ,随着叶片正弯曲角的增加 ,通道涡一直位于叶栅端壁附近 ,其强度变化很小 ,但叶栅出口尾缘涡明显增强 ,并向叶栅中部扩展 ;同时 ,随着叶片正弯曲角的增加 ,叶栅端部总损失变化不大 ,但叶栅中部总损失迅速增加 ,导致叶栅总损失随叶片正弯曲角的增加而增大 。Experimental investigations on the flow fields o f a typical blade profile cascades are carried out with different bowed angles The exit flow fields of straight cascade and the positi ve bowed ca scade with bowed angles +10°,+20° and +30° are investigaed The results show that for the present blade profile,with increasing of the bowed angle,the passag e vortex is always near the endwall and the intensity does not change obviously, however intensity of the exit wake vortex increases and extends to the midspan o f cascade obvi ously,the total energy losses at the endwall does not change obviously,however t he total energy losses at the midspan increase sharply,so the total energy losse s of the whole cascade increase by the increasing of the bowed angle and the ene rgy losses of straight blade cascade is minimal

关 键 词：正弯曲叶片 涡轮静叶栅 流场 

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]