Wake of a bio-inspired flapping wing with morphing wingspan

doi:10.1007/s10409-023-23061-x

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Wake of a bio-inspired flapping wing with morphing wingspan
	He XY(何心怡); Liu Y(刘毅); Chen YX(陈一鑫); Wang SZ(王士召)
刊名	ACTA MECHANICA SINICA ; 10
	2023-10
卷号	39 页码:323061
关键词	Morphing wingspan Wake structures Flapping wing Leading-edge vortex Tip votices
ISSN号	0567-7718
DOI	10.1007/s10409-023-23061-x
英文摘要	This work uses a bio-inspired flapping wing model to numerically investigate the effect of morphing wingspan on wake structures. The model consists of a rectangular flat-plate wing heaving harmonically in a uniform incoming flow at the Reynolds number of 300 and Strouhal number of 0.3. The wingspan changes during heaving, with a maximum wingspan at the middle of downstroke and minimum wingspan at the middle of upstroke. The wake is characterized by two oblique chains of interconnected vortex loops. Although the morphing wingspan has little effect on the wake topology, it significantly affects the magnitude and size of the vortices near the wing surface, which leads to an asymmetric distribution of vortex loop chains in the wake. The shrinking of leading-edge vortex under the lower surface of the wing in downstroke and the destructive interaction of tip vortices in upstroke are identified as the two vortex dynamics corresponding to the asymmetric wake structures. The analysis on the lift coefficients shows that the above vortex interactions are mainly caused by the change of span length instead of spanwise velocity.
分类号	二类
WOS研究方向	Engineering, Mechanical ; Mechanics
语种	英语
WOS记录号	WOS:001018348800001
资助机构	Basic Science Center Program of the National Natural Science Foundation of China [11988102] ; National Natural Science Foundation of China [12102439, 92252203, 91952301] ; China Postdoctoral Science Foundation [2021M703290]
其他责任者	Wang, SZ (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. ; Wang, SZ (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/92407]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.{Chen Yixin, Wang Shizhao} Univ Chinese Acad Sci Sch Engn Sci Beijing 101408 Peoples R China 2.{He Xinyi, Liu Yi, Chen Yixin, Wang Shizhao} Chinese Acad Sci Inst Mech State Key Lab Nonlinear Mech Beijing 100190 Peoples R China
推荐引用方式 GB/T 7714	He XY,Liu Y,Chen YX,et al. Wake of a bio-inspired flapping wing with morphing wingspan[J]. ACTA MECHANICA SINICA, 10,2023,39:323061.
APA	何心怡,刘毅,陈一鑫,&王士召.(2023).Wake of a bio-inspired flapping wing with morphing wingspan.ACTA MECHANICA SINICA,39,323061.
MLA	何心怡,et al."Wake of a bio-inspired flapping wing with morphing wingspan".ACTA MECHANICA SINICA 39(2023):323061.