中文摘要：

文章基于CFD方法对NREL Phase VI风机的气动特性进行了数值模拟。根据NREL定桨变速的实验工况,通过求解三维非定常雷诺平均Navier-Stokes方程（RANS）,基于k-ωSST湍流模型分析了不同风速工况下的风机叶片流场特性,得到了气流沿叶片展向的流动分布。通过与NREL NASA-Ames风洞实验数据的对比,在低风速时采用CFD仿真的计算结果与实验结果更为吻合;在失速区域,由于气流分离的影响,CFD仿真的计算结果与实验结果对比差异较明显。CFD仿真大体上能够较好地预测实验风机的性能,分析动态失速现象发生的原因,揭示叶片在三维旋转效应下的非定常气动特性。

英文摘要：

Based on computational fluid dynamics（CFD） method, this paper simulated the aerodynamic characteristics of NREL Phase VI wind turbine. Reynolds-Averaged Navier-Stokes（URANS） turbulence models are used in the simulations, and extensive comparisons with experimental data are performed. By the comparison for power, thrust and sectional force coefficients of NREL Phase VI wind turbine between CFD and NREL, the results at constant pitch and variable wind speed show that the CFD predictions match the experimental data consistently well at low wind speed. At high wind speed, there is a little difference due to the effects of flow separation. The simulation results reveal the unsteady aerodynamic characteristics of wind turbine blade with three-dimensional rotational effect.