风剪切对风力机设计的无关性分析

根据指数律的风速分布函数,对风轮扫掠面积上的实际风功率与以风轮中心风速为设计风速产生的风功率的差值做精确计算,得到了风功率的增量。在四类廓线指数、七种塔架高度情况下,利用数值积分方式计算得到的结果表明,采用风轮中心风速做为单一的设计风速是切实可行的,风剪切对于风力机的气动设计基本无关。

Irrelative Analysis of Wind Shear in the Design of a Wind Turbine

According to the wind speed distribution function with exponential rule,the difference value is accurately calculated between the actual wind power produced through the rotor swept area and the wind power produced by taking wind speed at the rotor centre as the design wind speed,and the power increment is obtained.The results of numerical calculation for four wind shear exponents and seven tower heights shows that taking the wind speed at the rotor centre as the initial uniform design wind speed is reasonable,and that wind shear is independent of the aerodynamics design of a wind turbine.