水平轴风力机叶尖涡流动的PIV测试  

PIV EXPERIMENT ON TIP VORTEX FLOW OF HORIZONTAL AXIS WIND TURBINE

作　　者：高志鹰[1,2] 汪建文[1,2] 东雪青[1,2] 韩晓亮[3] 白杨[1] 由志刚[1] 

机构地区：[1]内蒙古工业大学能源与动力工程学院,内蒙古呼和浩特010051 [2]内蒙古自治区可再生能源重点实验室,内蒙古呼和浩特010051 [3]内蒙古电力勘测设计院,内蒙古呼和浩特010020

出　　处：《工程热物理学报》2010年第3期414-418,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50976047);内蒙古自然科学基金重点项目(No.20080404ZD15)

摘　　要：在风洞开口实验段,针对不同尖速比应用PIV技术对风轮附近1/3圆周内的瞬时速度场进行测试。随着尖速比的增加,叶尖涡运动的径向位移增大,涡流诱导效应区域半径扩大,使整体尾迹半径增大;同时,尖速比增加使尾迹轴向速度亏损增大,叶尖涡运动的轴向位移减小。叶尖涡诱导效应与风轮旋转的相互作用使风轮附近形成强速度梯度区域,诱导效应延伸到风轮上游,激励叶片产生不同的振动形态,使叶片上脱落的叶尖涡结构在尾迹中出现波动,越向下游运动波动越强烈。通过叶尖涡核位置平均发现,在10°～120°方位角尾迹区域内,涡核运动轨迹与方位面交点的连线近似为直线,且该线的斜率随着尖速比的增加而增大。In wind tunnel opening, the instantaneous flow field in 1/3 circle around the rotor were measured by PIV under different tip speed ratio. As the tip speed ratio increases, the radial displacement of tip vortex increases, the radius of tip vortex inducible region increases, the radius of overall wake increases. At the same time, the axial velocity defect increases, and the axial displacement of tip vortex decreases. There was a stronger velocity gradient region around the rotor because of the interaction between tip vortex induce and rotor rotation, the vibration inspirited by inducible flow makes the tip vortex shedding from the blade fluctuating in wake, and the stronger fluctuations far away the rotor. By the locality average, the rule was found that the intersections connection of tip vortex trajectory and azimuth planes approximately is line, and its slope increase with the tip speed ratio.

关 键 词：水平轴风力机 尾迹 叶尖涡 涡量 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]