小型水平轴风力机翼型气动分析与叶片设计

Aerodynamic analysis of airfoil and blade design for small horizontal axis wind turbines

利用XFOIL程序模拟了S822翼型与S823翼型在光洁翼面与粗糙翼面下的性能变化,并基于MATLAB程序,采用Wilson方法进行了1 500 W水平轴风力机叶片设计。结果显示,光洁翼面下S822翼型最大升阻比高于S823翼型,粗糙翼面下S823翼型呈现出更好的粗糙度不敏感性;在额定叶尖速比时,S822翼型与S823翼型功率系数均达到最大值,分别为0.451 3与0.463 9;在有效叶尖速比范围内,S823翼型的功率系数C_P、推力系数C_T、扭矩系数C_M均高于S822翼型。因此,考虑到粗糙环境,选取S823翼型进行1 500 W风力机叶片设计的性能更加优良。

In this study, XFOIL software was used to simulate the aerodynamic performance variation under smooth and rough conditions of S822 airfoil and S823 airfoil, and based on MATLAB,the 1 500 W horizontal axis wind turbine blade was designed by Wilson method. Results showed that the maximum lift drag ratio of S822 airfoil was higher than S823 airfoil under the smooth condition,S823 airfoil exhibited better roughness insensitivity under the rough condition; the power coefficient of S822 airfoil and S823 airfoil reached the maximum value of 0.451 3 and 0.463 9 at the rated tip speed ratio, respectively; the power coefficient CP, thrust coefficient CT and torque coefficient CM of S823 airfoil were higher than S822 airfoil in the effective range of tip speed ratio. Therefore, considering the rough pollution factors, the performance in 1 500 W wind turbine blade design of S823 airfoil is more excellent.