大型风电机组气动响应特性分析

Analysis of aerodynamic response characteristics in large wind turbines

针对大型风电机组柔性多体塔架-叶片耦合结构气动响应问题,文章提出了在不同偏航角度下的分析方法。根据该方法的流程图,建立了大型风电机组柔性多体塔架-叶片耦合结构动力学模型。采用谐波叠加法计算气动载荷分布,考虑塔影效应与风剪切的影响,得出诱导因子时程曲线与气动响应均值。计算结果表明:轴向与切向诱导因子变化较小,尾流稳定;偏航角逐渐增大导致塔顶顺风向位移均值减小,根方差值增大。该结果为大型风电机组运行过程中监测状态参数的变化与流体动力学分析提供了参考。

Aiming at the aerodynamic response of flexible multi-body tower-blade coupling structure of large wind turbines, an analysis method at different yaw angles is proposed. According to the flow chart of this method, a dynamic model of flexible multi-body tower-blade coupling structure of large wind turbines is established. The aerodynamic load distribution is calculated by harmonic superposition method, and the influence of tower shadow effect and wind shear is taken into account, and the inducement is obtained. Derivative factor time history curve and aerodynamic response mean value. The results show that the axial and tangential inducing factors change slightly and the wake is stable. With the increase of yaw angle,the mean displacement along the wind direction at the top of the tower decreases and the root variance increases. The results provide a reference for the change of monitoring state parameters and hydrodynamic analysis of large wind turbines during operation.