Lift enhancement by dynamically changing wingspan in forward flapping flight

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	Lift enhancement by dynamically changing wingspan in forward flapping flight
	Wang SZ(王士召); Zhang X(张星); He GW(何国威); He, GW (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
发表期刊	PHYSICS OF FLUIDS
	2014-06
卷号	26 期号:6 页码:61903
ISSN	1070-6631
摘要	Dynamically stretching and retracting wingspan has been widely observed in the flight of birds and bats, and its effects on the aerodynamic performance particularly lift generation are intriguing. The rectangular flat-plate flapping wing with a sinusoidally stretching and retracting wingspan is proposed as a simple model for biologically inspired dynamic morphing wings. Numerical simulations of the low-Reynolds-number flows around the flapping morphing wing are conducted in a parametric space by using the immersed boundary method. It is found that the instantaneous and time-averaged lift coefficients of the wing can be significantly enhanced by dynamically changing wingspan in a flapping cycle. The lift enhancement is caused by both changing the lifting surface area and manipulating the flow structures responsible to the vortex lift generation. The physical mechanisms behind the lift enhancement are explored by examining the three-dimensional flow structures around the flapping wing. (C) 2014 AIP Publishing LLC.
关键词	Immersed Boundary Method Leading-edge Vortices Insect Flight Aerodynamic Performance Unsteady Aerodynamics Wake Structure Free Vortex Bat Flight Kinematics Flow
学科领域	Mechanics ; Physics
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000341175200005
项目资助者	This work was supported by the National Natural Science Foundation of China under Project Nos. 10872201, 11232011, 11302238, and 11372331, and the National Basic Research Program of China under Project No. 2013CB834100 (Nonlinear science). Tianshu Liu would like to acknowledge the hospitality received at LNM during his visit, where he accomplished this work. The simulations were performed on TianHe-1. The authors would like to acknowledge the support from National Supercomputer Center in Tianjin. In addition, we would like to thank the reviewer for his/her constructive and meticulous comments.
课题组名称	LNM湍流
论文分区	一类/力学重要期刊
引用统计	被引频次：48[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/49142
专题	非线性力学国家重点实验室
通讯作者	He, GW (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Wang SZ,Zhang X,He GW,et al. Lift enhancement by dynamically changing wingspan in forward flapping flight[J]. PHYSICS OF FLUIDS,2014,26,6,:61903.
APA	Wang SZ,Zhang X,He GW,&He, GW .(2014).Lift enhancement by dynamically changing wingspan in forward flapping flight.PHYSICS OF FLUIDS,26(6),61903.
MLA	Wang SZ,et al."Lift enhancement by dynamically changing wingspan in forward flapping flight".PHYSICS OF FLUIDS 26.6(2014):61903.

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