复杂工况下的大型风力机气动性能和尾迹研究Investigation of aerodynamic performance and wake of the large scale wind turbine in complicated conditions

在复杂工况下，大型风力机非定常特性会更严重，导致风力机气动性能变化和尾迹预测更加复杂。本文主要针对稳态偏航、动态偏航、风剪切和随机风速场等复杂工况，基于自由涡尾迹方法，嵌入复杂工况的模块，加入了动态失速模型和三维旋转效应模型修正，实现了复杂工况数值模拟计算，比较了不同复杂工况的气动载荷和尾迹形状。最后，得出了风力机在复杂工况下的气动性能、载荷和尾迹叶尖涡线特性，并计算出风力机在复杂工况下的气动载荷超调量和迟滞时间。对推进自由涡尾迹方法应用于风力机工程的大批工况载荷计算，提高大型风力机的载荷计算精度和设计水平等具有重要意义。

Investigation of aerodynamic performance and wake of the large scale wind turbine in complicated conditions

The large scale wind turbines suffer more serious unsteady characters in complicated conditions,which brings about the aerodynamic and wake prediction becoming more complex.For steady yaw,dynamic yaw,wind shear and stochastic wind field,the free vortex method is used to calculate aerodynamic,and the dynamic stall model and the three dimensional stall delay model are taken into account.At the same time,the complicated conditions are added to the calculative code.Moreover,the data results of complicated conditions are compared with the numerical calculation of complicated conditions.Finally,the characteristics of aerodynamic performance,loads and tip vortex lines are found,and the overshoot and lag time of wind turbine loads are calculated.It is significant for pushing on the application of free vortex method on the mass loads calculations of the wind turbine,and improving the loads calculations accuracy and design quality of large scale wind turbines.