一种风力机风轮设计和优化方法研究

Study on an Approach for Wind Rotor Design and Optimization

为保证风力机具有最大的风能利用系数,本文主要对水平轴风力机风轮的设计和优化方法进行了研究。通过对叶片翼型的弦长和扭角的优化计算,可以得出叶片的几何参数,包括叶片数、叶片各断面的翼型选择以及叶片根部的安装位置等。根据提出的优化设计方法编制了相关软件,给出的算例说明了采用不同单一翼型设计的风轮在相应设计叶尖速比下的风能利用系数和轴向力系数的变化规律。

The main objective of this paper is to investigate the horizontal-axis wind turbine(HAWT) rotors,which are optimized to produce the largest possible power output.Refined blade geometry is obtained from the best approximation of the calculated theoretical optimum chord and twist distributions of the rotating blade.The selected design parameters include the number of blades,type of airfoil section and the blade root offset from hub center.A computer program is developed and several numerical examples are given,and the results show the variation rule of the power and thrust coefficients with the design tip speed ratio for various rotor configurations.