微型扑翼仿生“0”字和“8”字形扑动方式气动特性研究

Investigation of “0”-Figure and “8”-Figures Wingtip Path Effect on Aerodynamic Performance of Micro Flapping-wing

微型扑翼飞行器的气动特性由扑翼的运动规律所决定,为了研究复杂翼梢轨迹对扑翼气动特性的影响,通过对上下扑动、弦向扭转和前后掠动三个自由度的运动设计不同的参数,运用数值模拟方法研究微型扑翼采用仿生"0"字形和"8"字形运动时的气动特性。结果表明:相比于传统的扑动运动,增加了扫掠运动的"0"字形和"8"字形扑动可有效增加升力,特别是"8"字形扑动的增升效果更加显著,但同时也会造成阻力略增,可以通过调整扭转角度来增加推力。本文的研究结果可为复杂运动规律下微型扑翼飞行器设计提供参考。

The aerodynamic performance of flapping-wing micro air vehicle（FMAV）is determined completely by the motion of flapping wings.In order to study the complex wingtip trajectory influence on the aerodynamic characteristics,the＂0＂and＂8＂figures effects are investigated by numerical method.The movement is divided into three degrees of freedom：plunging,pitching and swing with different parameters setting.The numerical results show that,compared with the traditional flapping motion,the flapping manners in ＂0＂and ＂8＂figures can effectively increase the lift because of the added swing motion,especially in the＂8＂figure flapping.However,the drag increased slightly at the same time.The thrust can be increased by adjusting the pitching angle.This study can be provided as a reference for the FMAV design with a complex wingtip trajectory.