In order to meet design requirement of high-performance tailored airfoil for wind turbine rotor blades, a parametric representation method for wind turbine airfoil shape is presented. Firstly, based on computational geometry theory, a class of Bezier curves with shape parameter are developed. These curves is more flexible to express geometry profile because they have good features inherently possessed by the Bezier curves and the ability of shape adjustability maintaining the feature polygon. Secondly, the controllability is improved considering the characteristics of wind turbine airfoils. A novel parametric representation method for wind turbine airfoils is developed. Finally, with the comparison results of the comprehensive and detailed representation ability shown through fitting typical wind turbine airfoils, the effectiveness of the method is proved.%为满足开发高性能风力机专用翼型所需,提出一种风力机翼型参数化表达方法.首先,基于计算几何理论,开发了一类带形状可调参数的广义Bézier曲线,该曲线不仅保持了Bézier曲线良好的特性,而且具有维持控制多边形不变而实现形状可调的能力,能够更灵活地表达几何外形.然后,针对风力机翼型特点,将此类曲线进行可控性改进,发展了一种风力机翼型参数化表达方法.最后,通过表达常用翼型,以及同其他表达方法进行外形拟合对比,验证了新方法具备全面细致的表达能力,进一步以拟合DU93-W-210为标准算例,与其他方法进行气动特性的吻合表现对比,最终验证了新方法的有效性.
展开▼
