风力机翼型气动性能数值模拟方法研究

Study on simulation methods for aerodynamic performance of wind Turbine airfoils

为更精确地模拟风力机翼型的气动特性,采用势流-边界层耦合方法、基于Navier-Stokes(N-S)方程的计算流体力学(CFD)方法模拟了翼型的气动参数,并与相关实验值进行对比,探讨各模拟方法的特点与准确性。结果表明:基于势流-边界层耦合方法的Xfoil程序能较好地预测翼型在附着流状态时的气动特性,且较适宜低雷诺数的流动;对于翼型失速状态,CFD方法表现较好,且高精度T-SST湍流模型表现最佳,并能较好地捕捉流场细节变化。

In order to provide more accurate simulation of the aerodynamic characteristics of airfoil, by viscous-inviscid interaetion method, the computational fluid dynamics （CFD） approach which based on Navier-Stokes （N-S） equation was employed to simulate the aerodynamic parameters of aifoil. By the comparison of the simulate results and experi- ment results, characteristics and accuracy of each simulation method were evaluated. The results showed that Xfoil pro- gram, based on viscous-inviscid interaction method, could preferably predict the aerodynamic characteristics of airfoil under attached-flow conditions, and was suitable for flow at low Reynolds number. As for stall on airfoil, the CFD method was better, and the high accuracy T-SST turbulent model which could capture minor changes of flow field was the best.