为探究具有鸮类特征的风力机叶片出气边开槽的V结构表面气动性能，采用SST k-ω湍流模型，对750 W的标准风力机叶片和仿生风力机叶片翼型的周围流场进行计算。结果表明：仿生V结构表面的风力机叶片阻力系数和吸力面的压力系数均小于标准叶片。分析发现V结构表面能够改变旋涡区位置，漩涡区偏离叶片表面，流动阻力减小。在测量攻角（α=0°~30°）范围内，标准叶片和仿生叶片的升阻比都呈现先递增后减小的规律。在攻角为20°时，标准叶片的升阻比达到最大值，其值为4.03。攻角为25°时仿生V结构风力机叶片的升阻比达到最大值，相比于标准叶片，升阻比增加了73.7%，压力面附着效应增强，升阻比得到提高。

To investigate the aerodynamic performance of Vstructure surface slotted on the outlet side of wind turbine blades with owl like characteristics,the flow field around 750 W standard wind turbine blade and bionic wind turbine blade airfoil was calculated by using SST k-ω turbulence model.Results show that the drag coefficient and pressure coefficient of suction surface of bionic Vstructure are smaller than those of standard blade.It is found that the Vstructure surface can change the position of the vortex area,so that the vortex area is far away from the blade,and the flow resistance decreases.With the angle of attack in the range of α=0°~30°,the liftdrag ratio of both the standard blade and the bionic blade increases first and then decreases.When the angle of attack is 20°,the lifttodrag ratio of the standard blade reaches the maximum value of 4.03.For the bionic Vstructure wind turbine,when the blade angle of attack is 25°,the liftdrag ratio reaches the maximum value of 7.0,73.7% higher than that of the standard blade.The adhesion effect on the pressure surface is improved.

TK83

国家自然科学基金（51765062）；新疆维吾尔自治区高校科研计划项目(XJEDU2017S013)