论文部分内容阅读
本文对NRELPhase VI上风型风力机叶片和塔架之间的干涉流动进行了三维非定常数值模拟。所有计算算例均采用ICEM-CFD划分的六面体网格,文章模拟计算了包括有无塔架两个模型分别在7,10和20 m/s三个来流速度下的6个算例。模拟结果发现,扭矩在180°方位角附近有瞬时突变的过程,但该波动值相对于整体性能影响较小,同时发现随着风速提高,塔架干涉的影响存在一个滞后的现象。在叶片经过塔架时,引起的截面流场和载荷的变化规律,为流场的优化提供参考。
In this paper, the three-dimensional unsteady numerical simulation of the interference flow between NRELPhase VI wind turbine blade and tower is carried out. All computational examples are based on hexahedron grids partitioned by ICEM-CFD. Six examples are given to simulate the flow velocities of the two models with and without tower at three flow rates of 7, 10 and 20 m / s, respectively. The simulation results show that the torque momentarily abruptly changes near the azimuth angle of 180 °, but the fluctuation value has little effect on the overall performance. At the same time, it is found that the influence of the tower interference has a lag phenomenon as the wind speed increases. When the blade passes the tower, the variation of the flow field and the load caused by the cross section of the tower will provide reference for the optimization of the flow field.