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分别采用空间迭代法以及时间步进法的自由尾迹计算模型对风力机的尾迹进行预测。结合相应的算例以及模型特点预测风力机在正对来流、偏航以及变工况下的风力机尾迹形状并与相应的实验值进行比较。结果表明,在计算稳态工况时,空间迭代法可以快速稳定的预测出尾迹形状,而时间步进法在计算稳态工况时可以很好的收敛到初始值,而其瞬态特性保证该方法可以计算风力机在变工况下的气动特性。两种方法得到的尾迹形状基本反映叶尖涡结构的特性,可以用来作为升力线、升力面等工程模型算法的尾迹部分,用以进行水平轴风力机的气动性能预测。
The wake of the wind turbine is predicted by using the free wake model of spatial iteration and time stepping respectively. Combining with the corresponding examples and the characteristics of the model, the wake of the wind turbine is predicted and compared with the corresponding experimental data. The results show that the space iteration method can predict the wake shape quickly and steadily when calculating the steady-state condition, while the time step method can well converge to the initial value when calculating the steady-state condition, while the transient characteristics guarantee The method can calculate the aerodynamic characteristics of a wind turbine under varying conditions. The wake shape obtained by the two methods basically reflects the characteristics of the vortex structure of the tip and can be used as the wake part of the engineering model algorithm such as lift line and lift plane to predict the aerodynamic performance of a horizontal axis wind turbine.