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Ventilated cloud cavitating flow around a blunt body close to the free surface
Wang YW(王一伟); Xu, Chang; Wu XC(吴小翠); Huang CG(黄晨光); Wu XQ(吴先前); Huang, CG (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
2017-08-22
发表期刊PHYSICAL REVIEW FLUIDS
卷号2期号:8
ISSN2469-990X
摘要Ventilated cavitation occurs as a complicated problem if the free surface is close to the cavity boundary around a high-speed underwater vehicle. The present study investigate the cavitating flow around a blunt axisymmetric body very near the free surface. A typical experiment is conducted by using a launching system with a split Hopkinson pressure bar device, and a numerical scheme is established based on large eddy simulation and volume-of-fluid methods. Unsteady behavior, including air entrainment and shedding of the cloud cavity, is observed, and high consistency is achieved between numerical and experimental results. Distinctions of evolution features between the cavities on the upper and lower sides are presented and analyzed. First, strong entrainment of noncondensable air occurs and changes the fluid property inside the cavity, which makes the cavity larger. Moreover, given the small distance between the vehicle and the free surface, the re-entrant jet generated in the upper part is thin and cannot completely cut off the main cavity, which causes the upper part of the cavity to remain approximately unchanged after the growth stage without the occurrence of the shedding phenomenon. Finally, the evolution of vortex structures is also discussed by comparisons with the motions of the air entrainment, re-entrant jet, and shedding cavity.
DOI10.1103/PhysRevFluids.2.084303
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收录类别SCI
语种英语
WOS记录号WOS:000408129900002
关键词[WOS]LARGE-EDDY SIMULATION ; NUMERICAL-SIMULATION ; UNSTEADY CAVITATION ; SHALLOW-WATER ; HYDROFOIL ; MODEL ; PREDICTION
WOS研究方向Physics
WOS类目Physics, Fluids & Plasmas
项目资助者National Natural Science Foundation of China(11202215 ; Youth Innovation Promotion Association CAS(2015015) ; 11332011)
课题组名称LMFS冲击与耦合效应(LHO)
论文分区Q4
力学所作者排名1
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文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/70030
专题流固耦合系统力学重点实验室
通讯作者Huang, CG (reprint author), 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
Wang YW,Xu, Chang,Wu XC,et al. Ventilated cloud cavitating flow around a blunt body close to the free surface[J]. PHYSICAL REVIEW FLUIDS,2017,2(8).
APA 王一伟,Xu, Chang,吴小翠,黄晨光,吴先前,&Huang, CG .(2017).Ventilated cloud cavitating flow around a blunt body close to the free surface.PHYSICAL REVIEW FLUIDS,2(8).
MLA 王一伟,et al."Ventilated cloud cavitating flow around a blunt body close to the free surface".PHYSICAL REVIEW FLUIDS 2.8(2017).
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