由于涵道本体与螺旋桨之间存在相互影响的气动关系,使得小型涵道式飞行器飞行状态的气动特性更加复杂。为了分析涵道与螺旋桨的相互影响对飞行器整体气动特性的作用效果,文中在理论分析的基础上利用CFD软件对相应气动参数进行了数值计算。涵道的存在虽然提高了飞行器整体的气动升力,但也增大了其飞行状态下的气动阻力与俯仰力矩。因此,小型涵道式飞行器的气动结构应进行合理的优化,以期提高其整体气动效率。

The aerodynamic characteristics of a ducted fan UAV are difficult to realize for the complex aerodynamic relationship between the duct and the propeller. In order to analyze the effect on the aerodynamic characteristics of UAV, a CFD software was used to calculate the aerodynamic parameters to obtain the aerodynamic relationship of the duct and the propeller. Although the presence of the duct improves the aerodynamic lift of the aircraft, the aerodynamic drag and pitching moment in forward flight also increase. So, the structure of the ducted fan UAV should be optimized to improve aerodynamic efficiency of UAV.