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根据翼型俯仰运动规律,采用非结构动网格技术和不同的湍流模型对风力机的动态失速特性进行计算,其结果表明,动网格技术能有效计算振荡翼型的气动特性,较好地捕捉出风力机翼型在动态失速过程中涡的产生、脱落及湮灭过程;并得出SST k-ω湍流模型在运动翼型气动性能的计算方面有较高精度。
According to the rule of pitch movement, the dynamic stall characteristics of the wind turbine are calculated by using unstructured dynamic grid technique and different turbulence models. The results show that the moving grid technology can effectively calculate the aerodynamic characteristics of the oscillating airfoil. It captures the generation, shedding and annihilation processes of wind turbine airfoils during dynamic stalling process. It also shows that the SST k-ω turbulence model has higher accuracy in the calculation of aerodynamic performance of moving airfoils.