用Fluent分析仿生翅翼运动产生的升力和升力系数

摘要

在微型扑翼飞行器的分析和设计中,仿生翅翼运动所产生的升力和升力系数具有重要的意义.应用计算流体力学分析软件Fluent对其进行了研究.研究结果表明翅翼在不同的运动模式下所产生的升力和升力系数是不同的,对比翅翼在匀速拍动或单纯以正弦规律拍动时的升力系数和基于铰链四杆机构驱动翅翼拍动时产生的升力系数,结果表明后者拍动时可以获得更大的升力系数;Fluent是对不同的翅翼运动模式下进行升力和升力系数分析比较简便、有效的工具.%A commercial software ,named Fluent,is employed to analyze the lift and lift coefficient of flapping motion of a bionic wing, which is important in the design and analysis of a micro air vehicle. The results of this study show that the different flapping motions will lead to different lifts and lift coefficients,compare the lift coefficient which is based on Flapping-wing mechanism driven by four-bar linkage with that got from the bionic flapping-wing's uniformflapping orflap at the law ofsinusoidal movement. the for mer can get a bigger lift coefficient,and Fluent is a simple but effective tool to obtain the lift and lift coefficient for a designed fiapping motion.