水平轴风力机气动性能的三维数值计算

3-D numerical simulation of aerodynamic performance of horizontal-axis wind turbine

采用带转捩修正的k-ωSST湍流模型对美国国家可再生能源实验室的失速控制型NRELPhaseVI风轮在几个不同来流风速下的气动性能进行三维数值模拟,并与NASAAmes风洞试验结果以及无失速延迟修正的升力面方法得到的结果进行对比分析。详细描述不同风速下风力机叶片周围的流场以及叶片吸力面极限流线分布情况。分析表明:CFD方法能够比较准确地预测风力机的功率以及展向空气动力载荷,在风力机设计和性能预测领域将得到更广泛的应用。

3-D numerical calculations of aerodynamic performance of the stall regulated NREL Phase VI Rotor under different inflow wind speeds are carried out with the application of k-ω SST turbulence model with transition correction.The calculated results are then compared with the NASA Ames wind tunnel tests and those from the lift surface methods without stall delay models.The paper also represents in detail the flow field around the blade under various wind speeds and the distribution of the limiting streamlines on the suction surface of the rotor blade.Analysis shows that CFD methodology can accurately predict wind turbine power and spanwise aerodynamic loads, and will surely be more and more widely used in the wind turbine design and performance prediction.