偏航工况下水平轴风力机尾流时序特征实验研究

Experimental Study on Timing Characteristics of Horizontal Axis Wind Turbine Wake Under Yaw Conditions

风力机的尾流效应会导致整个风电场风速分布不均匀。为研究风力机尾流效应的规律性,对比0°、15°、30°不同偏航角工况下的风力机尾流速度开展风洞实验研究。分析风力机尾流时序特征的同时,采用最大信息化理论统计方法分析风力机水平方向上特征测点位置的相关性。结果表明,不同偏航工况下,风力机下游尾流径向方向上速度的相互影响不同,同时风力机展向方向的不同距离处,同一特征测点速度也存在不同的相互影响;且随偏航角的增大,尾流宽度增大,尾流逐渐恢复。

The wake effect of wind turbine can lead to the uneven wind speed distribution throughout the wind farm.In order to study the regularity of wind turbine wake effect,this paper conducts a wind tunnel experimental study to compare the wind turbine wake velocity under different yaw angle conditions of 0°,15°,and 30°.The correlation between the wind turbine wake velocity and the location of the characteristic measurement points in the horizontal direction of the wind turbine is analyzed using the maximum information theory statistical method.The results show that the interaction of velocities in the radial direction of the downstream wake of the wind turbine is different under different yaw conditions,and the interaction of velocities at different distances of the wind turbine spreading direction is also affected;and the width of the wake increases and the recovery of the wake gradually increases with the increase of the yaw angle.