达里厄垂直轴风力机叶片螺旋变异优化研究

针对传统达里厄( Darrieus)直叶片垂直轴风力机在运行过程中出现叶片动转矩周期波动性大，动转矩系数曲线 震荡剧烈，造成对风轮旋转主轴的强烈冲击及风力机功率输出不稳定等问题，文章提出对Darrieus垂直轴风力机传统直 叶片进行螺旋扭曲变异设计，以改善风力机叶片的动转矩输出性能。结合SolidWorks和MATLAB完成风力机模型的三 维参数化建模，在流体仿真软件FLUENT中完成模型的数值模拟仿真计算。通过螺旋扭曲角的单因素试验验证了变异 设计叶片输出的动转矩性能周期波动性降低，平均动转矩得到提高，并确定螺旋扭曲角的优化区间。文章构建了风力机 系统模型建立与仿真体系，采取螺旋扭曲变异设计，改善了风力机叶片输出的动转矩性能，初步确定合理的螺旋扭曲角 分布范围为：70°~ ll0°。

Research on Optimization of Helical Twisted Blade of Darrieus Vertical Axis Wind Turbine

In order to solve the problems of strong torque pulse, lower average torque, and strong cyclic fatigue force on the blades and unsmooth power output in the operation of traditional Darrieus straight-blade vertical axis wind turbine (VAWT) , a helical twisted design for the traditional straight-blades was put forward in this paper. By combining SolidWorks and MATLAB, the parametric modeling of variant wind rotor was finished, and the dynamic numerical simulation for the operation process of Darrieus wind rotor was done with the CFD software of FLUENT. The single factor experimental study of helical twisted angle showed that the new design reduced the cyclic pulse of the torque and improved the torque, which determined an initial reasonable distribution range of helical twisted angle. This paper indicated the construction of the wind turbine system model and simulation system and helical twisted design could be used to improve the output of the wind turbine blade dynamic torque performance, the range had been optimized helical twist of the foot which was between 70° and ll0°.