前缘弯掠(扭)斜流转子叶尖脱落涡的PIV研究  

PIV experimental research of the tip shedding vortex flow of the leading edge skewed-swept diagonal flow rotors

作　　者：游斌[1] 周拨[1] 汪学军[1] 吴克启[1] 

机构地区：[1]华中科技大学能源与动力工程学院

出　　处：《华中科技大学学报（自然科学版）》2004年第11期7-9,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目 (5 0 176 0 12 );教育部博士学科点专项基金资助项目 (2 0 0 2 0 4 870 2 5 )

摘　　要：应用PIV技术测量了一开式前缘弯掠 (扭 )斜流转子的叶尖脱落涡的结构及其发展演化趋势 .测量结果表明 ,叶尖脱落涡产生于叶片顶部区域 ,沿着一条与转子旋转方向相反的斜线向下游发展 .叶尖脱落涡的强度随叶轮转速的提高而增强 ,随背压的提高而减弱 ,当背压增加到一定程度时 ,叶尖脱落涡消失 .实验结果为前缘弯掠 (扭 )The stall condition at the lower flow rate and the stall margin of diagonal flow rotors could be improved with the help of a leading edge skewed-swept diagonal flow rotors. The structure and the evolvement process of the tip edge shedding vortex of an open skewed-swept diagonal flow rotor by using PIV technology were measured. The results showed that the shedding vortex emerged near the tip edge of the blade, and extended to the downstream of the rotor in a slant line opposite to the rotor rotation direction. The intensity of the tip shedding vortex was boosted up with the increase of the rotation speed and decreased with the increase of the background pressure. The tip shedding vortex disappeared when the background pressure was increased to a certain degree. The experimental results provided the important data of internal flow for the optimization, the noise reduction and application of the leading edge skewed-swept diagonal flow rotors on the outdoor unit of the centralized air conditioners.

关 键 词：斜流转子 前缘弯掠 叶尖脱落涡 PIV 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]