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褶皱对蜻蜓翅滑翔气动力的影响

发表时间:2009-09-15  浏览量:1598  下载量:720
全部作者: 许蕾,孙茂
作者单位: 北京航空航天大学航空科学与工程学院
摘 要: 研究了褶皱对蜻蜓翅膀滑翔时气动力的影响。蜻蜓翅截面用褶皱模型模拟,应用计算流体力学(computational fluid dynamics,CFD)方法计算了二维褶皱翅模型和二维平板翅模型平动时的气动力 (Re =1 000; α=0~40°)。结果表明:褶皱翼和平板翼的气动特性差别不大 (褶皱翼的气动力特性略逊于平板翼)。在较大攻角下气动力出现波动时,褶皱翼的气动力波动比平板翼的要小。蜻蜓翅膀褶皱的存在应该主要是为了增强翅膀的结构强度,而不是为了改善气动性能。
关 键 词: 仿生流体力学;蜻蜓;计算流体力学;褶皱;滑翔
Title: The effects of corrugation on the aerodynamic force production of a model dragonfly wing in gliding flight
Author: XU Lei, SUN Mao
Organization: School of Aeronautic Science and Engineering, Beihang University
Abstract: The effects of corrugation on the aerodynamic force production of 2D model insect (dragonfly) wings in translational motion at Reynolds number 1 000 and angle of attack ranging from 0�to 40�were studied using the computational fluid dynamics (CFD) method. A representative wing corrugation was considered. The aerodynamic forces of a 2D flat-plate model under the same condition as the corrugated model were also computed. Numerical flow simulations indicate that the difference in aerodynamic efficiency between two models is small (the corrugated model is slightly inferior to the flat-plate model). The fluctuation in aerodynamic forces of corrugated model is smaller than that of flat-plate model after flow separation at relatively large angle of attack. Instead of improving the aerodynamic performance, corrugations should be mainly evolved to enhance the structural strength of wings.
Key words: biofluid mechanics; dragonfly; computational fluid dynamics; corrugation; gliding
发表期数: 2009年9月第17期
引用格式: 许蕾,孙茂. 褶皱对蜻蜓翅滑翔气动力的影响[J]. 中国科技论文在线精品论文,2009,2(17):1766-1772.
 
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