不同机型中小型风电机组尾流的数值模拟研究

Numerical Simulation of Wake Flow of Small and Medium-sized Wind Turbines in Different Size

为了给山东东营某风电测试场中风力机机位布置的优化提供理论依据,利用CFD对测试场中6台不同机型的中小型风电机组的尾流特性进行数值模拟计算,通过对比各机型尾流纵、横向速度分布云图及速度分布曲线得出:10kW、30kW风力机尾流在16D处恢复至来流风速,横向尾流影响范为-0.75D^0.75D之间,较其他机型恢复速度快.额定转速更快的1.5kW、3kW风力机和风轮直径最大的100kW风力机尾流速度在18D处恢复至来流风速的90%左右,横向尾流影响范围为-1.25D^1.25D.风轮直径与额定转速均会对尾迹恢复速度和尾迹影响范围产生影响.

In order to provide a theoretical basis for the optimization of the wind turbine location arrangement in a wind power test site in Dongying,Shandong,the CFD numerical simulation method was used to simulate and analyze the six small and medium wind turbines of different type in the test field.The wake characteristics of the longitudinal and lateral long tail flow areas were studied.The similarities and differences of the wake recovery ability of different types of wind turbines were compared.It is found that the wake of 10kW and 30kW wind turbines recovers to the incoming wind speed at 16D,and the lateral wake impact range is between-0.75D and 0.75D,which is faster than other wind turbines.The 1.5kW,3kW wind turbine with the fastest rated speed and the 100kW wind turbine with the largest diameter of the wind turbine have a wake velocity of 90%of the incoming wind speed at 18D,and the lateral wake has a range of-1.25D^1.25D.Both the diameter of the wind wheel and the rated speed affect the wind turbine wake recovery speed and wake range.