仿鸟羽毛扑翼气动性能分析

Imitation Bird Feather Flapping Wing Aerodynamic Performance

针对仿鸟扑翼羽毛构型设计的问题,建立单个羽毛CFD模型及扑翼仿鸟羽毛型飞行器模型,研究羽毛构型与所能提供升力规律。首先基于羽毛形状建立羽毛简化模型,然后利用Fluent软件分析单根羽毛扑动过程中的气动规律及羽毛升阻力系数随羽毛弯角的变化。机翼上下扑动时,同时参与俯仰运动,内翼与外翼间也存在弯曲运动,机翼也会带动各部位羽毛参与相对应运动。仿真结果表明羽毛随机翼运动时,在一定流速下,升力及阻力分别随羽毛弯角变化。

Aiming at the design of feather-shaped configuration of the bird-like flapping wing,a single feather CFD model and the bird-like flapping wing aircraft model are established to study the feather configuration and the law of lift provided.Firstly,a simplified feather model is established based on the shape of the feather,and then the Fluent software is used to analyze the aerodynamic law and the feather lift resistance coefficient during the single feather flutter with the change of the feather angle.When the wing flaps up and down,it also participates in the pitching motion,there is a bending motion between the inner wing and the outer wing,and the wing also drives the feathers of each part to participate in the corresponding movement.The simulation results show that the lift and resistance change with the bend angle of the feather at a certain flow rate and the influence of the change of the feather bend angle on the feather lift resistance.