下风向风力机的塔影效应研究  

The research of tower shade effect of down wind turbine

作　　者：张玉良[1] 李仁年[1] 巫发明[1] 

机构地区：[1]兰州理工大学流体动力与控制学院,甘肃兰州730050

出　　处：《山东建筑大学学报》2008年第3期243-246,共4页Journal of Shandong Jianzhu University

基　　金：国家重大基础研究计划(973计划)(2007CB714605);甘肃省科技攻关项目(2GS052-A52-004-03)

摘　　要：从风力机获取能量角度出发,充分考虑风剪切与塔影效应,精确推导出作用于下风向风力机风轮扫掠面积上理论风功率的计算式。研究表明,风功率是塔架高度、风速廓线指数和塔架直径的函数。通过算例得出塔影效应是不容忽略的,可采用减小塔架直径的方式使风力机输出更多的功率,所有这些都将进一步完善风力机的设计理论。The power expression by the wind passing through the rotor swept area of back wind direction wind turbine is accurately deduced from energy viewpoint based on wind shear and tower shadow effect. The research show that the wind power is a function of tower height, wind shear exponents and tower diameter. The calculation example concludes that the influence of tower of wind turbine is indispensable. Moreover, the more wind power is outputted by decreasing the diameter of wind turbine. All the above standpoints might be an improvement for the design theory of wind turbine.

关 键 词：下风向 风剪切 塔影效应 风功率 匹配 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]