On the topology and unsteady behavior of ventilated cavitating flow over a bluff body
文献类型：期刊论文
| 作者 | Wang ZY(王志英)6; Lao TT(劳铁涛)5,6 ; Yan, Guojun4; Wang JZ(王静竹)6; Wang Z(王展)5,6; Tian, Wenbin3; Wang, Guoyu2; Wang YW(王一伟)1,5,6
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| 刊名 | ACTA MECHANICA SINICA
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| 出版日期 | 2024-10-01 |
| 卷号 | 40期号:10页码:12 |
| 关键词 | Ventilated cavitating flow Vortex shedding POD |
| ISSN号 | 0567-7718 |
| DOI | 10.1007/s10409-024-24082-x |
| 通讯作者 | Wang, Yiwei(wangyw@imech.ac.cn) |
| 英文摘要 | The cavity topology and unsteady behavior of ventilated cavitating flow over a bluff body are investigated experimentally using high-speed imaging and particle image velocimetry measurements. It is observed that the cavity topology shows a distinct variation at different Reynold numbers (Re) for a given gas flow rate Q. For gas flow rate Q = 4.16 litres per minute (LPM), the cavity topology is substantially the same at different Re, and the separated shear layer forms the basis for the cavity breakup and shedding vortices. However, for Q = 16.67 LPM, the cavity length decreases, and the cavity topology changes from supercavity to large-scale shedding with the increasing of Re. According to the observations, the balance of gas injection and the gas leakage capacity of shedding vortices, which can be estimated by the cavitation vortex size and the vortex shedding frequency, determines the cavity topology. In addition, the proper orthogonal decomposition analysis indicates that the existence of natural cavitation in the ventilated cavitating flow mainly affects the temporal variation of shedding and makes the periodic change of vortex dynamic more complicated. |
| 分类号 | 二类/Q1 |
| WOS关键词 | PROPER ORTHOGONAL DECOMPOSITION ; SPECIAL EMPHASIS ; WAKE ; SUPERCAVITY ; CYLINDER ; PATTERN ; SQUARE ; NUMBER |
| 资助项目 | National Natural Science Foundation of China[12372243] ; National Natural Science Foundation of China[11902323] ; National Natural Science Foundation of China[12122214] ; National Natural Science Foundation of China[62371453] ; National Natural Science Foundation of China[1229300] ; National Natural Science Foundation of China[12293003] ; National Natural Science Foundation of China[12293004] |
| WOS研究方向 | Engineering ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001395024300001 |
| 资助机构 | National Natural Science Foundation of China |
| 其他责任者 | Wang, Yiwei |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/98098]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Future Technol, Beijing 100049, Peoples R China 2.Beijing Inst Technol, Sch Mech & Vehicular Engn, Beijing 100081, Peoples R China; 3.China Agr Univ, Coll Engn, Beijing 100083, Peoples R China; 4.Beijing Inst Astronaut Syst Engn, Beijing 100076, Peoples R China; 5.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 6.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 ZY,Lao TT,Yan, Guojun,et al. On the topology and unsteady behavior of ventilated cavitating flow over a bluff body[J]. ACTA MECHANICA SINICA,2024,40(10):12. |
| APA | 王志英.,劳铁涛.,Yan, Guojun.,王静竹.,王展.,...&王一伟.(2024).On the topology and unsteady behavior of ventilated cavitating flow over a bluff body.ACTA MECHANICA SINICA,40(10),12. |
| MLA | 王志英,et al."On the topology and unsteady behavior of ventilated cavitating flow over a bluff body".ACTA MECHANICA SINICA 40.10(2024):12. |
入库方式： OAI收割
来源：力学研究所
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