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水平轴风力机风轮气动性能计算能准确描述风力机的运行状况,为风力机风轮气动设计结果提供评价和反馈。为探索风轮气动性能高精度的计算方法,在南航利用CFD软件Fluent中使用大涡模拟,对SVIAB WG500风力机的气动特性进行数值研究,并对洞壁干扰因素进行修正。结果证明,由于能够对大尺度涡流精确计算,大涡模拟比S-A模型在风力机气动性能计算上具有更高的精度。在大涡模拟计算结果的基础上,对三维风轮气动性能做进一步地分析,得到SVIAB WG500风力机的最佳运行尖速比以及沿叶高方向翼型气动变化规律。
The calculation of the aerodynamic performance of the horizontal axis wind turbine rotor can accurately describe the operation status of the wind turbine and provide the feedback and evaluation for the aerodynamic design results of the wind turbine rotor. In order to explore a high-precision calculation method of aerodynamic performance of wind turbine, a large-eddy simulation using CFD software Fluent was carried out to study the aerodynamic characteristics of SVIAB WG500 wind turbine and to correct the interference factors of the tunnel wall. The results show that large-eddy simulation is more accurate than the S-A model in calculating the aerodynamic performance of the wind turbine due to the accurate calculation of large-scale eddy currents. Based on the results of large eddy simulation, the aerodynamic performance of the three-dimensional wind turbine is further analyzed. The optimal operating tip-speed ratio of the SVIAB WG500 wind turbine and the aerodynamic variation of the airfoil along the blade height direction are obtained.