风力机错列布置尾流效应

为在有限土地资源内提高风电场发电效率,减少上风机对下风机尾流效应影响,通过利用Windcube V2多普勒测风仪方法研究了两台风机错列布置状态下风机尾流场变化,比较无尾流状态和有尾流状态下风机的速度场和分析风机之间的尾流影响。结果表明：上风机尾流效应对下风机第二象限区影响最大,轴向速度出现先减小后增加在减小在增加过程；第一象限区出现先减小后增加过程。径向和切向速度幅值和频率出现先增加后减小,径向速度幅值和频率5D截面处最大,3D最小,切向速度幅值和频率5D截面处最大,8D最小。可见上风机对下风机尾流叠加形成复杂的湍流现象,湍流强度促使尾流内外流场融合,从而造成不同速度值的之间的差异。

Influence of Wake-up Effect Based on Staggered Arrangement of Wind Turbine

In order to improve the power generation efficiency of wind farms within the limited land resources and reduce the impact of the upper fan on the wake of the lower fan. By using the Windcube V2 Doppler wind gauge method, the wake changes of the two fans in the staggered arrangement state were used to investigate to study the influence of the wind wake field and no the wind wake field between the two fans, which was compared and analyzed. The results show that the wake of the has the greatest influence on the second quadrant of the lower fan. The axial velocity first decreases then increases and again decreases then increases and the first quadrant region first decreases and then increases. The radial and tangential velocity amplitudes and frequencies appear first increase and then decrease. The radial velocity amplitude and frequency are the largest at the 5D section, and the 3D is the smallest. The tangential velocity amplitude and the frequency are the largest at the 5D section, and the 8D is the smallest. It is concluded that the upper fan forms a complex turbulence phenomenon on the wake of the lower fan, and the turbulence intensity promotes the integration of the internal and external flow fields of the wake, thus causing the difference between different velocity values.