小翼对水平风力机流场特性的改变  

Change of flow field performance of a horizontal wind turbine by a tip vane

作　　者：贾瑞博[1] 汪建文[2] 

机构地区：[1]内蒙古科技大学能源与环境学院,内蒙古包头014010 [2]内蒙古工业大学能源与动力工程学院,内蒙古呼和浩特010051

出　　处：《华北电力大学学报（自然科学版）》2010年第5期83-87,共5页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家自然科学基金资助项目(50566001);教育部博士学科点专项科研基金资助项目(20091514110001)

摘　　要：实验和数值模拟已经证明了风力机叶片的叶尖添置小翼,可以提高风能转化效率。为了清楚地了解小翼对风力机动力放大的影响,对加小翼和不加小翼的风力机流场——速度场和压力场的特性进行了分析。这个分析是基于对风力机加V(8.8×8)型小翼和不加小翼时叶轮周围流场数值模拟的结果。可以看出小翼对风力机的叶端产生的影响较大,即加大了风力机叶端的压差和速度。同时结合一定位置的压力和速度图的分析,可以看出小翼使风力机叶尖的漩涡强度降低,提高了能量的转换,从而提高了效率。It was proved that a tip vane could improve the wind turbine＇s efficiency by the test and the numerical simulation.To distinctly understand the power augmentation effect of the wind turbine by the tip vane,the flow field of the wind turbine with and without a tip vane — the performance of the velocity field and the pressure field were analyzed.The analysis based on the numerical simulation result of the flow field of the wind turbine with the tip vane-V（8.8×8） and without the tip vane.The tip vane generates the more influence to the blade tip of the wind turbine and improves the pressure difference and velocity of the blade tip of the wind turbine.The vortex intensity around the blade tip is reduced from the pressure figure and the velocity figure of the certain location.These all improve the energy transformation and efficiency.

关 键 词：风力机 叶尖小翼 流场特性 压力场 速度场 数值模拟 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]