中文摘要：

叶尖加小翼可以提高风力机的功率系数。本文在风洞开口试验段利用PIV技术，对旋转风力机叶尖加装V型小翼时叶片和小翼周围的流场进行了实验研究。比较加小翼和不加小翼时的流场图，发现加上小翼后，叶尖部分的流场得到了改善，小翼对风力机的主要影响范围是从截面r／R=0．86到1．04之间，约占主叶片长度的14％左右。

英文摘要：

A power coefficient of a wind turbine is improved when vanes are added to blade tips. The experiments are carried out at the open test section of a wind tunnel and a PIV technique is used to test the fluid field surround the V shaped tip vanes. In this paper, the fluid field graphs of wind turbines with vanes and without vanes are compared. At the part of blade tip, the fluid field is improved. The vane affects the wind turbine at the range of r/R=0.86 to 1.04, about 14% of the main blade.