微型机械蜻蜓的气动特性研究

Research on Aerodynamic Characteristics of Micro-Mechanical Dragonfly

摘要: 本文根据蜻蜓的飞行特性，分析推导并拟合了符合蜻蜓翅膀运动规律的运动方程，将蜻蜓的翅膀运动应用到微型扑翼飞行器的气动性能研究上。本研究基于非稳态的Navier-Stokes方程的数值模拟，通过编写翅膀的速度函数来控制翅膀的运动，结合动网格技术，利用计算流体力学软件进行计算求解，并在此基础上，研究了不同的飞行速度，翅膀尺寸等因素对其升力值的影响。所得的结果和结论对微型机械蜻蜓的设计有参考和指导意义。

Abstract: According to the dragonfly’s flight characteristics, we analyze the motion of the wings of the dra-gonfly, and apply the dragonfly wing’s motion equation to the study of the aerodynamic characte-ristics. The numerical simulation is based on the unsteady Navier-Stokes equations. We control the movement of the wings by writing a function combined with dynamic mesh and use the ANSYS Fluent to get results. We also study the effect of different flight speed and wing’s size. The results and conclusions will be applied to the design of the micro-mechanical dragonfly.