为增加风电场总输出功率，基于大涡模拟(Large Eddy Simulation,LES)方法，采用致动线(Actuator Line,AL)技术，通过swak4Foam产生指数率风剪切，利用OpenFOAM对两台串列布置的5 MW风力机风电场进行不同叶轮俯仰数值模拟，对比各工况下风电场总输出功率，并结合流场分布云图分析总输出功率存在差别的内在原因。结果表明：风电场上游风力机尾迹会严重减弱下游风力机性能；俯仰策略可有效提升风电场总输出功率；俯仰角从0°增大/减小到±35°过程中，呈现出上游风力机功率先增后减、下游风力机功率持续增加的规律，风电场总输出功率升至极大值后开始下降；正俯仰角时风电场总输出功率较负俯仰角时的总输出功率更高。

In order to increase the total output power of wind plant,fifteen rotor tilts of wind plant with two tandem 5 MW wind turbines were numerically simulated using OpenFOAM based on the AL (Actuator Line) technique,LES(Large eddy simulation) method and wind shear generated by the swak4Foam.The total output power of wind plant for every operation condition was compared and fluid field distribution contours were employed to investigate intrinsic causes for the existing difference in the total output power.The results show that the wake of upstream wind turbine in wind plant can seriously weaken the performance of downstream wind turbine.The tilt strategy can effectively promote the total output power of wind plant.When the tilt angle steps from 0°to ±35°,the power of upstream wind turbine increases firstly and then decreases，while the power of downstream wind turbine has a constant rise.Thus,the total output power of wind plant does not decline unitl it reaches its maximum.The wind plant total output power with positive rotor tilt angles is higher than that with negative rotor tilt angles.

TK83

国家自然科学基金（51976131，51676131）；国际(地区)合作与交流项目（51811530315）；上海市“科技创新行动计划”地方院校能力建设项目（19060502200）