Aerodynamics and mechanisms of elementary morphing models for flapping wing in forward flight of bat

查看全文 作　　者：Ziwu [1,2]GUAN;Yongliang [1]YU

机构地区：[1]The Laboratory for Biomechanics of Animal Locomotion, University of Chinese Academy of Sciences;[2]Department of Modern Mechanics, University of Science and Technology of China

出　　处：《Applied Mathematics and Mechanics(English Edition)》索引2015年第36卷第5期,共12页

基　　金：Project supported by the National Natural Science Foundation of China(No.10602061) 摘　　要：Large active wing deformation is a significant way to generate high aerodynamic forces required in bat's flapping flight. Besides the twisting, elementary morphing models of a bat wing are proposed, including wing-bending in the spanwise direction,wing-cambering in the chordwise direction, and wing area-changing. A plate of aspect ratio 3 is used to model a bat wing, and a three-dimensional unsteady panel method is used to predict the aerodynamic forces. It is found that the cambering model has great positive influence on the lift, followed by the area-changing model and then the bending model. Further study indicates that the vortex control is a main mechanism to produce high aerodynamic forces. The mechanisms of aerodynamic force enhancement are asymmetry of the cambered wing and amplification effects of wing area-changing and wing bending. Lift and thrust are generated mainly during downstroke, and they are almost negligible during upstroke by the integrated morphing model-wing. 关键词：bat wing bending cambering area-changing aerodynamic force

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Aerodynamics and mechanisms of elementary morphing models for flapping wing in forward flight of bat

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