相同雷诺数和尖速比下缩比风力机流动特性分析

Analysis on Flow Characteristics of Scaled Wind Turbines at Same Reynolds Number and Tip Speed Ratio

针对NREL Phase VI（D=10．058m）风力机及其两个缩比模型（D=1．5m和D=1．0m）在叶片表面理想光滑状态，相同雷诺数（Rec（0.75R）≤7．42×10^5）和尖速比（λ≤10．00）下，CFD计算得到的功率系数和推力系数不同展开原因调查，通过比较和分析各模型的流场信息，揭示了引起气动特性差异的主要原因，同时采用修正缩比模型入流风速的方法得到了与原型功率系数一致的入流风速修正系数。

The flow characteristics of NREL Phase VI wind turbine （diameter=10.058 m） and its two scaled models （diameter=1.5 m and 1.0 m） with perfect smooth blades were investigated by using CFD calculation at same Reynolds number （Rec（0.75R）≤7.42×10^5） and tip speed ratio （λ≤10.00）. The reasons why the power coefficients and axial thrust coefficients are different were revealed by comparing and analyzing the flow information of models. In addition, the correction coefficient of inflow wind speed for a scaled model to agree with the power coefficient of prototype was obtained.