| Investigations into the ventilated cavities around a surface-piercing hydrofoil at high Froude numbers | |
Huang RF(黄仁芳); Qiu RD(丘润荻); Zhi, Yuchang2; Wang YW(王一伟)
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| Source Publication | PHYSICS OF FLUIDS
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| 2022-04 | |
| Volume | 34Issue:4Pages:43304 |
| ISSN | 1070-6631 |
| Abstract | This study investigates the ventilated cavities around a surface-piercing hydrofoil, aiming to extend previous studies by an in-depth understanding of the vaporous cavity behaviors and the flow-regime transition at high Froude numbers. An experiment is carried out in a constrained-launching water tank with a vertically cantilevered hydrofoil piercing a still water surface. The cavity is recorded using high-speed photography, and flow-regime maps are summarized over a broad range of Froude number and yaw angle at different immersed aspect ratios. In addition to the well-known steady flow regimes (i.e., fully wetted flow and fully ventilated flow), an unsteady vaporous cavitating flow is revealed at a very high Froude number with a small yaw angle, which exhibits cavitation shedding dynamics behaviors, including the cavity growth, destabilization, and collapse. The transition from the fully wetted flow to the fully ventilated flow is attributed to the vapor-cavitation-induced ventilation besides the tip-vortex-induced ventilation. Vaporous cavitation promotes ventilation formation, but it has to meet the criterion that air should enter the sub-atmospheric cavity through the tip-vortex path before the cavity length reaches the maximum. Moreover, an improved lifting-line model is developed with considering the effects of free surface and finite aspect ratio. Both analytical modeling and experimental measurements reveal that the vaporous cavity length follows a power relation against the cavitation parameter. Such knowledge lays a foundation for the design optimization and control strategy of high-speed hydrofoils. |
| Subject Area | Mechanics ; Physics, Fluids & Plasmas |
| DOI | 10.1063/5.0085553 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000832204400022 |
| Funding Organization | National Natural Science Foundation of China [52006232, 12122214] |
| Classification | 一类/力学重要期刊 |
| Ranking | 1 |
| Contributor | Wang, YW (corresponding author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190 AC, Peoples R China. ; Wang, YW (corresponding author), Univ Chinese Acad Sci, Sch Future Technol, Beijing 100049 AC, Peoples R China. ; Wang, YW (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049 AC, Peoples R China. |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/90206 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190 AC, Peoples R China 2.Univ Chinese Acad Sci, Sch Future Technol, Beijing 100049 AC, Peoples R China 3.Sun Yat Sen Univ, Sch Aeronaut & Astronaut, Guangzhou 510275 AC, Peoples R China 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049 AC, Peoples R China |
| Recommended Citation GB/T 7714 | Huang RF,Qiu RD,Zhi, Yuchang,et al. Investigations into the ventilated cavities around a surface-piercing hydrofoil at high Froude numbers[J]. PHYSICS OF FLUIDS,2022,34,4,:43304.Rp_Au:Wang, YW (corresponding author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190 AC, Peoples R China., Wang, YW (corresponding author), Univ Chinese Acad Sci, Sch Future Technol, Beijing 100049 AC, Peoples R China., Wang, YW (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049 AC, Peoples R China. |
| APA | 黄仁芳,丘润荻,Zhi, Yuchang,&王一伟.(2022).Investigations into the ventilated cavities around a surface-piercing hydrofoil at high Froude numbers.PHYSICS OF FLUIDS,34(4),43304. |
| MLA | 黄仁芳,et al."Investigations into the ventilated cavities around a surface-piercing hydrofoil at high Froude numbers".PHYSICS OF FLUIDS 34.4(2022):43304. |
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| Jp2022FA461_2022_Inv（6869KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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