| 小型昆虫“合拢-打开”运动机制的增升机理数值研究 |
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| 引用本文： | 张来平,常兴华,段旭鹏,张涵信.小型昆虫“合拢-打开”运动机制的增升机理数值研究[J].空气动力学学报,2009,27(2). |
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| 作者姓名： | 张来平 常兴华 段旭鹏 张涵信 |
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| 作者单位： | 中国空气动力研究与发展中心,四川,绵阳,621000 |
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| 基金项目： | 国家自然科学基金，中国空气动力研究发展中心创新基金 |
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| 摘 要： | 通过动态混合网格技术和基于虚拟压缩方法的不可压缩流非定常计算方法,对"合拢-打开"(clap-fling)机制下小型昆虫翼的周期性运动进行了数值模拟,并与单个翼拍动时的升力系数、流场结构进行了对比分析,同时对比研究了雷诺数对力学特性、流场结构的影响,探讨了"clap-fling"机制能够增强升力的流动机理.对比发现,"clap-fling"机制增升的关键在于合拢-打开过程中的三个升力峰值以及之后平动阶段的"不失速机制";且当雷诺数较小时,"clap-fling"机制增升效果最为明显.
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| 关 键 词： | 动态混合网格 不可压缩非定常流 生物仿生流体力学 Weis-Fogh机制 |
Numerical simulations of the "clap-fling" motion for tiny insect wings |
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| ZHANG Lai-ping,CHANG Xing-hua,DUAN Xu-peng,ZHANG Han-xin.Numerical simulations of the "clap-fling" motion for tiny insect wings[J].Acta Aerodynamica Sinica,2009,27(2). |
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| Authors: | ZHANG Lai-ping CHANG Xing-hua DUAN Xu-peng ZHANG Han-xin |
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| Institution: | China Aerodynamic Research & Development Center;Mianyang;Sichuan 621000;China |
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| Abstract: | While analyzing the hovering motion of the tiny wasp Encarsaria formosa,Weis-Fogh proposed a novel aerodynamic mechanism that enhanced lift during flight,known as the "clap-fling" mechanism.Based on the dynamic hybrid mesh generator and the unsteady incompressible solver developed by the authors before,the "clap-fling" motion as well as the flapping motion of a single wing are studied numerically in this paper.By comparing the flow structures and the lift/drag characteristics,the mechanism of lift-enhancing... |
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| Keywords: | dynamic hybrid mesh unsteady incompressible flow bio-flow dynamics "Weis-Fogh" mechanism |
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