| Ventilated partial cavitating flow around a blunt body near the free surface |
| Wang YW(王一伟) ; Wu XC(吴小翠); Huang CG(黄晨光)
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| 会议录名称 | Open Archives of the 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016
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| 2019
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| 会议名称 | 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016
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| 会议日期 | April 10, 2016 - April 15, 2016
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| 会议地点 | Honolulu, HI, United states
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| 摘要 | Ventilated cavitation occurs as an extremely complicated problem if the free surface is close to the cavity boundary around the high-speed underwater vehicle. The cavitating flow around a blunt axisymmetric body very near the free surface is investigated in the present paper. The typical experiment is carried out in a launching system based on an SHPB device, and the numerical scheme is established on the basis of large eddy simulation (LES) and volume of fraction (VOF) methods. Unsteady behaviors such as air injection and shedding of the cloud cavity were obtained, and good agreement was achieved between the numerical and experimental results. The distinctions of evolution features between the cavities on the up and down sides are presented and analyzed. Firstly, strong injection of non-condensable air occurs and changes the media property inside the cavity, which makes the cavity much larger and more stable. Furthermore, because of the small distance between the vehicle and the free surface, the re-entry jet generated in the upper part is very thin and cannot cut off the main cavity clearly, which induces that the upper part of the cavity is approximately unchanged after the growth stage and no shedding phenomenon occurs inside it. © Open Archives of the 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016. All rights reserved. |
| 关键词 | Axisymmetric bodies
Cavity boundaries
Free surfaces
High
speed underwater vehicles
Launching systems
Media properties
Unsteady behaviors
Ventilated cavitation
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| 资助信息 | This research was sponsored by National Natural Science Foundation of China (Grant numbers 11332011 & 11202215) and the Youth Innovation Promotion Association of CAS (Grant number 2015015).
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| 收录类别 | EI
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| 语种 | 英语
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| 文献类型 | 会议论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/80469
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| 专题 | 高温气体动力学国家重点实验室
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| 作者单位 | Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences, Beijing, China
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推荐引用方式
GB/T 7714 |
Wang YW,Wu XC,Huang CG. Ventilated partial cavitating flow around a blunt body near the free surface[C]Open Archives of the 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016,2019.
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