为降低上游风力机尾流的影响、优化风场布置，在两台串联的NERL 5 MW水平轴风力机中间安装1台小型的垂直轴风力机，形成垂直交错风场。采用FLUENT软件对串联风场和垂直交错风场进行数值模拟，对比两种风场的输出功率与流动特性。同时，改变垂直轴风力机的安装位置，分析其与下游风力机的距离对垂直交错风场的影响。结果表明：当风力机串联布置且为标准间距7D（D为风轮直径）时，下游风力机受上游风力机尾流影响仍然很大，输出功率下降57.1%；串联风场中加入垂直轴风力机加快了相应垂直交错风场尾流的恢复，提高了下游风力机的输出功率；垂直交错风场中垂直轴风力机安装距离为1D~6D时，可以在上游风力机功率变化不明显的情况下提高下游风力机的输出功率；当安装距离为6D时，下游风力机提高功率最高，比串联风场增加了40.1%。

In order to decrease the influence of upstream wind turbine wake and optimize the wind farm layout,a small vertical axis wind turbine(VAWT) was installed between two NERL 5 MW horizontal axis wind turbines(HAWT) in series to form a vertical staggered wind farm (VSWF).FLUENT software was used to numerically simulate the serial wind farm and the VSWF, the output power and flow characteristics of the two kinds of wind farms were compared and analyzed.Meanwhile, the installation position of the VAWT was changed to explore the influence of distances between VAWT and the downstream HAWT on the VSWF.The results show that when the wind turbine is arranged in series and the standard distance is 7D(D is the diamater of rotor), the output power of downstream wind turbine is decreased by 57.1% due to effect of the upstream HAWT wake;the installation of VAWT in serial wind farm accelerates the wake recovery of the corresponding VSWF and improves the output power of downstream wind turbine;when the installation distance of VAWT is from 1D to 6D in VSWF, the output power of downstream wind turbine can be improved significantly under the condition that the output power of upstream wind turbine is not changed obviously;when the installation distance is 6D, the downstream wind turbine has the highest power improvement, which is 40.1% higher than that of the serial wind farm.

TK8

国家自然科学基金（51976131）