【摘要】 考虑风力机塔影效应的影响，针对风轮仰角导致风力机气动特性更为复杂的问题，文章对不同仰角水平轴风力机流场进行了数值模拟，分析了风力机叶片截面压力分布、涡量以及塔筒表面压力随相位角的变化规律，探究了风轮仰角对风力机输出功率的影响。结果表明：增大风轮仰角会降低叶片表面压力，减小叶尖部分压差，使得叶片表面高涡量区域减小；添加风轮仰角会使叶片对塔筒影响减小，塔筒表面高涡量区域随着风轮仰角的增大逐渐减小，降低塔筒表面压力波动。当叶片经过塔筒时，塔影效应对风力机影响较大，风力机输出功率降低；当叶片竖直向上时，风力机输出功率达到最大。为风力机添加仰角后，随着风轮仰角的增大，风力机的输出功率与输出功率波动均呈现先增大后减小的趋势；风力机输出功率在风轮仰角为3°时最大，输出功率波动在风轮仰角为6°时最小。更多还原

【Abstract】 Considering the influence of the tower shadow effect of wind turbines, and aiming at the problem that the elevation angle of wind turbines makes the aerodynamic characteristics of wind turbines more complicated, the flow field of horizontal axis wind turbines with different elevation angles was numerically simulated in this paper, and the pressure distribution of wind turbine blade cross section, vorticity and the change law of the tower cylinder surface pressure with phase angle were analyzed, so as to explore the influence of the elevation angle of wind turbines on the output power of wind turbines. The results show that increasing the rotor elevation angle can reduce the blade surface pressure, decrease the pressure difference at the tip part, and reduce the high vorticity area on the blade surface. Adding elevation angle to the wind turbine reduces the influence of the blade on the tower barrel, and the high vorticity area on the tower barrel surface gradually decreases with the increase of the wind turbine elevation angle, thus reducing the pressure fluctuation on the tower barrel surface. When the blade passes through the tower, the tower shadow effect has a great influence on the wind turbine, and the output power of the wind turbine decreases. When the blade is upright, the wind turbine output power reaches its maximum. After the elevation angle is added to the wind turbine, both the output power of the wind turbine and the elevation angle of the wind turbine wheel increase first and then decrease.The output power of wind turbine increases when the elevation angle of wind turbine is 3 °, and the fluctuation decreases when the elevation angle is 6 °. The relevant conclusions can provide data support for the operation of wind turbine.更多还原