扑翼飞行二维情形数值分析

摘要

基于计算流体力学(CFD)方法对微扑翼飞行的非定常空气动力学问题进行研究,已被大多数学者所认可.在对昆虫飞行运动仿真模拟的基础上,建立了扑翼运动二维简化模型及运动方程,并利用FLUENT软件及其嵌入用户自定义函数(UDF)和动网格技术,分析了二维翼型在不同控制飞行参数(包括扑翼频率、最大转动幅值、平动和转动相位差等)下的平均升力和阻力系数.数值模拟所得结果为微扑翼飞行器的设计提供了参考依据.%It is employed by most scholars that the unsteady aerodynamics of flapping-wing Micro Air Vehicles(MAVs) are studied based on Computional Fluid Dynamics(CFD). A two-dimensional wing model and equation of motion are established for the flapping-wing MAVs,which mimicked insect flight.The average lift and drag coefficients are analyzed in different flight parameters of two-dimensional airfoil, such as flapping wing frequency, maximum rotation amplitude and phase difference between flinging and rotating, by CFD software with User Difined Function (UDF) and moving grid. Some CDF results are suitable for the design of flapping-wing MAVs.