中文摘要：

采用添加Gurney襟翼并光顺下弧面的方式对风力机专用翼型S822进行尾缘改型,利用k-ωSST湍流模型研究原始翼型和改进Gurney襟翼翼型的气动特性。计算分析了襟翼高度和压力面光滑连接襟翼顶端的开始位置,对翼型的升阻力系数、升阻比以及翼型表面压力分布和流场特性的影响。结果表明：开始改型位置相同时,随襟翼高度增加,升力系数在一定攻角范围内呈递增趋势,阻力系数持续增大,升阻比在襟翼高度为0.02弦长时最高;襟翼高度相同时,随开始改型位置后移,升力系数和升阻比增大,阻力系数变化很小。研究结论为风力机叶片翼型改型设计提供参考。

英文摘要：

The trailing edge of wind turbine airfoil S822 was modified by adding a Gurney flap and smoothing the lower cambered surface. The aerodynamic characteristics of S822 airfoil and its improved Gurney flap airfoils were studied with k-ω SST turbulence model. The effects of the flap height and starting modification position on the lift and drag coefficients, lift-drag ratio, airfoil surface pressure distribution and flow field characteristics were analyzed. The results showed that if the starting modification position was the same, the lift coefficient in certain range of attack angle and the drag coefficient increased with the increasing of the flap height. The lift-drag ratio was the maximum when the flap height was 2% chord length. If the flap height was the same, the lift coefficient and lift-drag ratio increased, and the drag coefficient changed little when the starting modification position was gradually close to the trailing edge. The research can provide references for designing airfoils of wind turbine blade.