【摘要】 通过求解非定常、不可压缩雷诺平均的Navier-stokes方程和SST k-ω双方程湍流模型,数值预测了LS0413翼型在0°～360°迎角范围内大尺度分离与失速流场特性。并对该翼型的动态失速特性进行了数值模拟,典型的正弦振荡计算结果表明:1)SST k-ω湍流模型能够较好地模拟翼型升力和阻力系数的迟滞环变化趋势;2)绕翼型的流场结构在轻失速和深失速下存在明显的差别。更多还原

【Abstract】 The numerical simulation of separated flows at high angles of attack for airfoil and its dynamic stall is presented through an incompressible flow solver accompanied with the k-ω SST turbulence model.In this paper,the author presents the characteristics of large scale separated flow and aerodynamic forces with the angles fromzero degree to 360 degree.The results of airfoil dynamic stall suggest that(1)the k-ω SST model is an effective model to simulate the dynamic stall,and(2)the flow fields structure under the circumstance of light stallis significantly different from that of deep stall.更多还原