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为提高垂直轴风力机的风能利用率,基于CFD数值模拟技术,分析了常用典型垂直轴风力机翼型的气动及功率特性,并以NACA0012翼型为基础对其进行改进。对比改进前后翼型表明,增大翼型厚度可降低升阻比,增大翼型弯度可增强其失速特性;厚尾缘翼型、升阻互补型翼型可分别降低翼型失速性能、增加启动力矩,其中厚尾缘翼型的H型垂直轴风力机的功率系数较大,可提高风能利用率,为翼型优化设计提供了新思路。
In order to improve the wind energy utilization efficiency of vertical axis wind turbines, the aerodynamic and power characteristics of typical vertical axis wind turbine airfoils are analyzed based on CFD numerical simulation technology. Based on the NACA0012 airfoil, the aerodynamic and power characteristics are improved. The comparison of the improved airfoil before and after the airfoil shows that increasing the thickness of the airfoil can reduce the drag-drag ratio and increase the airfoil camber to enhance its stalling characteristics. The thick trailing edge airfoil and lift-drag complementary airfoil can reduce the airfoil stalling performance and increase Starting torque, of which the thick-tailed H-shaped vertical axis airfoil wind power factor larger, can improve the utilization of wind energy, airfoil optimized design provides a new idea.