一种实用的风力机叶片气动设计方法研究

提出了水平轴风力机叶片的优化设计模型,该模型以风轮平均年能量输出最大为设计目标,并将风速的概率分布考虑进来。为了获得较好的优化结果,首先采用PROPID程序对叶片进行反设计,获得较好性能的叶片几何,在此基础上,运用遗传算法进行搜索寻优,这样不仅减小了搜索的范围,也降低了搜索的时间。对叶片面积附加约束,以获得符合实际的叶片,采用5阶贝塞尔函数在设计点之间进行插值,以获得光滑的几何外形。利用该方法优化设计了600kW风力机叶片。与已有叶片相比,优化结果显示了明显的优越性,验证了该优化方法的有效性和实用性。

Research on a practical aerodynamic design method for blade of horizontal axis wind turbine

An optimization design model for blades of horizontal axis wind turbines has been presented in this paper,which takes the maximum of annual energy output as the design objective.And the probability of wind speed distribution has been taken into account.The PROPID program is used to get the baseline of blade with a better performance firstly,and then the genetic algorithm is used to optimize the baseline.In order to get a smooth blade figuration,a 5th order Bezier curve is used to fit through the control points.Using the developed optimization method,the blades of a 600kW wind turbine were designed.Compared with the initial blades,the designed shows obvious advantages,which verifies the effectiveness of the optimization method.