中文摘要：

以100 W水平轴风力机为研究对象,当来流风速为12.5m/s时,建立数值计算模型和实验模型,通过模拟计算与实验测量,得到风轮旋转平面后不同间距断面处的速度和压强分布情况.将模拟值与实验值进行对比研究,结果表明：风轮下游3倍风轮直径处的实验值与模拟值拟合较好,随着风轮后轴向距离的增大,实验值与模拟值存在一定的差异.从速度云图可以看出,水平轴风力机的尾流场从风轮旋转平面产生,在叶片尾缘处脱落且逐渐膨胀,在来流风速的影响下逐渐向下游扩散,且轴向速度亏损值随着轴向距离的增大而逐渐减小,尾迹区域渐渐收缩,最终与大气来流逐渐融合.

英文摘要：

Taking a 100 W horizontal-axis wind turbine as research object,its numerical computation model and experimental model are established in the case of 12.5m/s oncoming wind speed.By means of measuring and simulating the wind speed and pressure on the sections behind the rotor at intervals,their distribution on the sections is obtained.The results show that the experimental and simulative values at three times the rotor diameter distance behind the rotor are well consistent with each other and there are some differences between them due to the increase of the axial distance from the rotor.It can be seen from the speed nephogram that the wake flow field of horizontal-axis wind turbine takes place from rotor rotation plane expands gradually downstream,diffuses gradually downstream due to the influence of the oncoming wind speed,and the loss of the axial wind velocity decreases gradually with the axial distance so that the area of the wake will contract and mix gradually with the external atmospheric flow eventually.