鸭翼对盒式翼布局气动特性的影响研究

摘要

盒式翼布局带有前置鸭翼对飞机纵向力矩特性产生显著的影响。针对某盒式翼布局无人机，采用数值模拟方法研究鸭翼对盒式翼布局气动性能的影响，以及鸭翼安装角、鸭翼沿机身轴线的纵向位置和鸭翼面积对巡航状态下盒式翼布局气动性能的影响。结果表明：鸭翼可以提高盒式翼布局的最大升力系数和失速迎角，可以有效地调节纵向力矩，但是会使最大升阻比略微减小；在巡航迎角3°、巡航速度50 m／s状态下，鸭翼安装角和鸭翼面积对盒式翼布局气动特性影响较大，而鸭翼纵向位置对盒式翼布局气动特性影响较小。综合考虑鸭翼的上述参数，可以显著提高盒式翼布局的气动性能。%The box‐wing layout with canard could significantly improve the whole vehicle’s longitudinal pitching moment properties .For the box‐wing layout of UAV ,the canard’s influence on the aerodynamic performance of box‐wing layout ,and the influence of the canard installation angle ,canard longitudinal position along the body axis ,and canard area on the aerodynamic performance of box‐wing layout under cruising flight are studied through numerical simulation .Results show that :canard can increase the box‐wing layout’s maximum lift coef‐ficient and the stall angle of attack ,and can effectively regulate the longitudinal pitching moment ,but will slightly reduce the maximum lift‐to‐drag ratio ;under cruising angle of attack of 3° and cruising speed of 50 m/s ,the installation angle and area of canard will have a great influence on the aerodynamic performance of box‐wing layout while the canard longitudinal position will affect less on the box‐wing layout .Above all ,it can be concluded that the canard can significantly improve aerodynamic performance of the box‐wing layout with the comprehensive consideration of these parameters of canard .