Study on the cavity dynamics of water entry for horizontal objects with different geometrical shapes

doi:10.1016/j.oceaneng.2022.111242

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Study on the cavity dynamics of water entry for horizontal objects with different geometrical shapes
	Du, Yan 3,4; Wang, Zhiying 4; Wang, Yiwei 2,3,4; Wang, Jingzhu 4; Qiu, Rundi 2,3,4; Huang, Chenguang 1
刊名	OCEAN ENGINEERING
	2022-05-15
卷号	252 页码:12
关键词	Water entry Cavity dynamics Pinch-off depth Vortex evolution
ISSN号	0029-8018
DOI	10.1016/j.oceaneng.2022.111242
通讯作者	Wang, Zhiying(wangzhiying@imech.ac.cn)
英文摘要	The influence of geometrical shapes on cavity evolution, flow fields and vortex structures evolution during water entry processes are investigated by experimental and numerical methods in this paper. The cavity evolution for water entry of four horizontal objects with different geometrical shapes are captured by high-speed photography. The experimental results indicate that although the geometrical shape has influence on cavity shape and size, the pinch-off depths are very close for the open cavity cases. In the numerical study, a compressible two-phase flow solver combing with large eddy simulation (LES) and dynamic overset mesh based on OpenFOAM (R) platform is adopted to observe the cavity dynamics, flow fields and vortex structures information. Numerical results reveal that the cavity produced by the object with trapezoid section expand at a relatively higher speed in the radial direction to form a larger cavity due to the more kinetic energy transference to the fluid. The vorticity evolution shows that for the object with circle section, the vortex structures alternately shed at the cavity tail shortly after the cavity separates from the free surface. However, for the object with trapezoid section, the cavity is squashed distorted due to the hydrostatic pressure without alternating vortex shedding.
资助项目	National Natural Science Foundation of China[12122214] ; National Natural Science Foundation of China[11902323] ; Youth Innovation Promo-tion Association CAS[Y201906] ; Youth Innovation Promo-tion Association CAS[2022019]
WOS关键词	IMPACT
WOS研究方向	Engineering ; Oceanography
语种	英语
WOS记录号	WOS:000806780000004
资助机构	National Natural Science Foundation of China ; Youth Innovation Promo-tion Association CAS
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/89633]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
通讯作者	Wang, Zhiying
作者单位	1.Chinese Acad Sci, Hefei Inst Phys Sci, Hefei 230031, Peoples R China 2.Univ Chinese Acad Sci, Sch Future Technol, Beijing 100049, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Du, Yan,Wang, Zhiying,Wang, Yiwei,et al. Study on the cavity dynamics of water entry for horizontal objects with different geometrical shapes[J]. OCEAN ENGINEERING,2022,252:12.
APA	Du, Yan,Wang, Zhiying,Wang, Yiwei,Wang, Jingzhu,Qiu, Rundi,&Huang, Chenguang.(2022).Study on the cavity dynamics of water entry for horizontal objects with different geometrical shapes.OCEAN ENGINEERING,252,12.
MLA	Du, Yan,et al."Study on the cavity dynamics of water entry for horizontal objects with different geometrical shapes".OCEAN ENGINEERING 252(2022):12.