基于Weilbull分布参数的风机翼型气动特性研究

Aerodynamic Characteristics Study on Wind Turbine Airfoil Based on Weibull Distribution Function

摘要: 风力发电机翼型的气动特性直接影响其效率。本文采用CFD方法对NACA4415翼型的气动特性进行了研究。针对某地区的风速分布特性，采用双参数Weibull函数的方法获得其风速分布概率，采用CFD技术建立了基于Weibull分布参数下翼型的气动特性的数值模拟计算方法，在来流攻角为12˚的情况下，获得了翼型的气动阻力、升力及阻力升力系数随Weibull分布参数的变化情况，建立了一种基于Weibull参数分布的实际风速情况下翼型气动特性的方法。

Abstract: The aerodynamic characteristics of wind turbine airfoil directly influence its efficiency. In this paper, the CFD method was used to study the aerodynamic characteristics of NACA4415 airfoil. The Weibull function method of two-parameter was used to obtain the wind speed probability distribution; the numerical simulation method was established based on Weibull distribution pa-rameters of the airfoil dynamic characteristic; and the airfoil aerodynamic drag, lift and the lift coefficient and drag coefficient were obtained on the 12 degree of attack angle. Then, a method for aerodynamic characteristics of airfoil on the actual wind speed was established based on the Weibull distribution function.