中文摘要：

风力机尾迹区域的流场特征对风电场的优化布置具有重要意义。文章基于流固耦合理论。采用ANSYS＋FLUENT方法和滑移网格技术对NREL5MW风力机的尾迹特性进行了系统分析。结果表明：在风力机近尾迹区流固耦合情况下风力机的输出功率和轴向推力更接近NREL设计值：在远尾迹区、双向流固耦合情况下，轴向速度更早地在风力机下游6倍风轮直径X=6D处达到来流速度。而湍流强度也提前在X=2D处出现拐点开始下降，在X=6D处达到9．8％，流场进入低湍流度区，从而得到了风力机合理布置方面的重要结论．这将对风力机合理布置和风电场经济性的提高提供一定的参考。

英文摘要：

The flow field characteristics of wind turbine wake is of great significance on optimization regional layout of wind farms. Based on the theory of two-way fluid-structure interaction, this paper uses the ANSYS＋FLUENT and sliding grid technique to analyze the wake characteristics of NREL 5 MW wind turbine.It is can be got that the output power of wind turbine and axial thrust are closer to the NREL design value in the wind turbine near wake zone, under fluid-solid coupling. In the far wake area, the axial velocity eaqual to flow velocity earlier at X =6D, under two-way fluid-structure interaction. And turbulence intensity began to decline in advance at X=2D where is a inflection point, and at X=6D reached 9.8%, then into the low degree of turbulence flow field area.Then some important conclusions on rational distribution of wind turbine were gained. Therefore it will provide the reference value for the rational layout of wind tubine and wind farm economy improvement.