| 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.
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| 发表期刊 | PHYSICAL REVIEW FLUIDS
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| 2017-08-22
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| 卷号 | 2期号:8 |
| ISSN | 2469-990X
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| 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. |
| DOI | 10.1103/PhysRevFluids.2.084303
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| URL | 查看原文
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| 收录类别 | SCI
; EI
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| 语种 | 英语
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| WOS记录号 | WOS:000408129900002
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| 关键词[WOS] | LARGE-EDDY SIMULATION
; NUMERICAL-SIMULATION
; UNSTEADY CAVITATION
; SHALLOW-WATER
; HYDROFOIL
; MODEL
; PREDICTION
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| WOS研究方向 | Physics
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| WOS类目 | Physics, Fluids & Plasmas
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| 项目资助者 | National Natural Science Foundation of China(11202215
; Youth Innovation Promotion Association CAS(2015015)
; 11332011)
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| 课题组名称 | LMFS冲击与耦合效应(LHO)
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| 论文分区 | Q4
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| 力学所作者排名 | 1
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/70030
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| 专题 | 流固耦合系统力学重点实验室
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| 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,.
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| 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).
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| 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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