新型随动变桨距小型垂直轴风力机的流场分析

摘要

The main purpose of this paper is to analyze the pressure and velocity field of a new type of small ver-tical axis wind turbine with a follow drive variable pitch. Through the numerical simulation ,the pressure field and velocity field distribution of the four static models are compared. The results show:in ideal state,the new type of small vertical axis wind turbine blade in the different position of the maximum pressure change is small, the maximum speed of the wind turbine to the various positions is approximately equal. Conclusion:in the process of rotation of the wind turbine,the maximum pressure and speed of the blade are relatively stable,which is help-ful for the rotation of the wind turbine and the vibration of the wind turbine is relatively small.%建立三叶片二维静态计算模型对新型随动变桨距小型垂直轴风力机进行数值计算，对比分析4种静态模型下压力场和速度场的分布情况，计算结果显示：理想状态下的新型随动变桨距小型垂直轴风力机，当流场稳定以后叶片处于各个位置的最大压力变化不大，风力机转动到各个位置的最大风速大致相等，表明此新型风力机在转动的过程中叶片产生的最大压力、速度相对稳定，这对其保持匀速转动很有帮助，并且对风力机整体结构所产生的颤振也相对较小。