Reconfiguration and drag reduction of flexible beam with point buoyancy in oscillatory flow

doi:10.1016/j.euromechflu.2025.01.006

IMECH-IR > 流固耦合系统力学重点实验室

	Reconfiguration and drag reduction of flexible beam with point buoyancy in oscillatory flow
	Song JX(宋吉祥)1 ; Chen WM(陈伟民)1,2 ; Yan DB(严定帮)3; Guo SX(郭双喜)1,2
通讯作者	Song, Jixiang([email protected]) ; Chen, Weimin([email protected])
发表期刊	EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
	2025-05-01
卷号	111 页码:162-175
ISSN	0997-7546
摘要	Flexible structures with point buoyancy widely exist in nature and engineering. Under the action of oscillating flow, it usually has a large geometric nonlinear dynamic response. However, the dynamic response and drag reduction of flexible structures with point buoyancy have not been studied. Therefore, the numerical method in this paper investigates the dynamic response and drag reduction of point buoyant flexible structures under oscillatory flow. Firstly, complex spatial curvilinear coordinates establish the dynamic partial differential equations of flexible structures with point buoyancy. Then, the implicit finite-difference time-domain method is used to discretize the partial differential equation in space and time to form an algebraic equation. Finally, the dynamic response and drag reduction of flexible structures under non-buoyancy, uniform buoyancy, and point buoyancy are numerically analyzed. The results show that with the increase of Cauchy number CY, the deformation of the flexible structure becomes larger and larger, and a local bending point appears. The dimensionless vibration frequency numbers explain the occurrence of local bending points. Unlike no buoyancy, uniform buoyancy and point buoyancy make the flexible structure smaller and more symmetrical. Uniform buoyancy and point buoyancy can increase the Reconfiguration number R. The greater the buoyancy and buoyancy position, the greater the Reconfiguration number R. The load on the flexible structure under oscillating flow is still less than that on the rigid structure. The Vogel exponent is calculated by fitting the Reconfiguration number R. The drag reduction is directly proportional to the Vogel exponent v, that is, the greater the Vogel exponent v, the greater the drag reduction. When the Cauchy number CY is large, the Vogel exponent v of uniform buoyancy and point buoyancy is smaller than that of non-buoyancy. The greater the point buoyancy and buoyancy position, the smaller the deformation of the flexible structure, the greater the Reconfiguration number R, and the greater the Vogel exponent v. When the buoyancy position is small, the influence of point buoyancy on the flexible structure can be ignored.
关键词	Bending drag reduction Oscillatory flow Cauchy number C Y Vogel exponent v
DOI	10.1016/j.euromechflu.2025.01.006
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001407431300001
关键词[WOS]	BLADE DYNAMICS ; FORCES ; PLATES ; MOTION ; WAVES
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
资助项目	Strategic Priority Research Program of Chinese Academy of Sciences[XDA22000000]
项目资助者	Strategic Priority Research Program of Chinese Academy of Sciences
论文分区	二类
力学所作者排名	1
RpAuthor	Song, Jixiang ; Chen, Weimin
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/98283
专题	流固耦合系统力学重点实验室
作者单位	1.Chinese Acad Sci, Key Lab Mech Fluid Solid Coupling Syst, Inst Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Hunan Inst Traff Engn, Sch Electromech Engn, Hengyang 421001, Hunan, Peoples R China
推荐引用方式 GB/T 7714	Song JX,Chen WM,Yan DB,et al. Reconfiguration and drag reduction of flexible beam with point buoyancy in oscillatory flow[J]. EUROPEAN JOURNAL OF MECHANICS B-FLUIDS,2025,111:162-175.Rp_Au:Song, Jixiang, Chen, Weimin
APA	宋吉祥,陈伟民,严定帮,&郭双喜.(2025).Reconfiguration and drag reduction of flexible beam with point buoyancy in oscillatory flow.EUROPEAN JOURNAL OF MECHANICS B-FLUIDS,111,162-175.
MLA	宋吉祥,et al."Reconfiguration and drag reduction of flexible beam with point buoyancy in oscillatory flow".EUROPEAN JOURNAL OF MECHANICS B-FLUIDS 111(2025):162-175.