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为了改善失速条件下风力机气动特性的CFD模拟精度,采用定常的RANS求解方法和一方程S-A湍流模型,数值模拟定桨距型风轮叶片LM19在高风速(18 m/s)条件下的气动特性。首先讨论了由流动大尺度分离导致计算收敛曲线大幅度振荡时数值结果的处理方法,然后分析了计算域尺度和网格密度对数值模拟结果的影响,为失速条件下风力机气动性能的CFD模拟提供参考。
In order to improve the accuracy of the CFD simulation of wind turbine aerodynamic characteristics under stalled conditions, a steady RANS solution and an equation SA turbulence model were used to simulate the aerodynamic performance of LM19 rotor blades under high wind speed (18 m / s) characteristic. Firstly, the treatment of numerical results caused by large-scale flow separation caused by large-scale oscillation of the convergence curve is discussed. Then the influence of the calculated domain and mesh density on the numerical simulation results is analyzed. The CFD simulation of aerodynamic performance of the wind turbine under stall conditions for reference.