旋转对风力涡轮叶片边界层的影响  

Effect of Rotation on Blade Boundary Layer of Wind Turbine

作　　者：杜朝辉[1] 刘富斌[1] 

机构地区：[1]上海交通大学动力与能源工程学院

出　　处：《上海交通大学学报》1999年第8期962-965,973,共5页Journal of Shanghai Jiaotong University

基　　金：国家留学回国人员基金;上海交大科研基金

摘　　要：基于经典二维叶素理论的水平轴风力涡轮设计与性能预估方法，在高风速（高能量输出）工况下得到的功率输出值通常小于实测值，即存在三维失速延迟现象．通过分析旋转对风力涡轮叶片边界层的影响，揭示产生这种失速延迟现象的物理机理．并在相同的运行条件下，比较二维工况与三维旋转工况下边界层各关键参数的差别，从而得到由于旋转的影响，边界层中气流分离点位置延迟以及动力输出增加等重要结论．The paper is aimed at describing a fundamental phenomenon:the effect of rotation on the blade boundary layer of wind turbine.By solving the 3 D integral boundary layer equations with the assumed velocity profiles and a closure of the model,the effects of rotation on blade boundary layers were investigated.Several key parameters,such as separation position and momentum thickness,were calculated and compared between the rotation and nonrotation cases.It is found that coriolis forces and centrifugal forces pay a key role in the stall delay.It is concluded that the stall is postponed due to the rotation and the separation point is delayed with the increase of rotation speed or decrease of the blade spanwise position.Possible modifications to the existing 2 D blade element/momentum theory (BEMT) methods were suggested.

关 键 词：风力涡轮 边界层 叶片 旋转 数值计算 

分 类 号：TK14[动力工程及工程热物理—热能工程] TK83