| Vertical water entry of projectiles with surface seal | |
Wang YF(王宇飞); Ye BS(叶秉晟) ; Wang ZY(王志英); Huang J(黄荐); Wang YW(王一伟); Huang CG(黄晨光)
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| Source Publication | OCEAN ENGINEERING
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| 2020-11-12 | |
| Volume | 216Pages:107606 |
| ISSN | 0029-8018 |
| Abstract | The water entry of a three-dimensional slender projectile with a constant vertical velocity is investigated numerically, and experiments are done to validate numerical results. We limit the scope of this work to the cavity forming stage at which surface seals. Typical experiments are carried out in a launching system. A pressure-based compressible multiphase solver combined with the Kunz cavitation model is developed within the OpenFOAM® platform. The numerical and experiment results show a good agreement. The time-dependent change regularity of the drag coefficient, pressure distribution, air-entrained cavity evolution, and flow characteristics inside the cavity are elaborated. Their relationships with the key parameter Froude number are also discussed. Results indicate that the drag coefficient after the impact phase is approximately equal to that in supercavitation case, and it is generally of the Froude number. Cavity shapes are generally independent of Froude number in the early stage of water entry. However, discrepancies in profiles gradually appear at a later time. For the airflow characteristics, circumferential vortex rings are found near the free surface in the early stage of water entry. The pressure inside the cavity decreases with time because of the rapid growth in cavity volume, which the entrained air cannot compensate for. |
| DOI | 10.1016/j.oceaneng.2020.107606 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000596863000008 |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Wang, Yiwei |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/85697 |
| Collection | 流固耦合系统力学重点实验室 |
| Recommended Citation GB/T 7714 | Wang YF,Ye BS,Wang ZY,et al. Vertical water entry of projectiles with surface seal[J]. OCEAN ENGINEERING,2020,216:107606.Rp_Au:Wang, Yiwei |
| APA | 王宇飞,叶秉晟,王志英,黄荐,王一伟,&黄晨光.(2020).Vertical water entry of projectiles with surface seal.OCEAN ENGINEERING,216,107606. |
| MLA | 王宇飞,et al."Vertical water entry of projectiles with surface seal".OCEAN ENGINEERING 216(2020):107606. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Jp2020428.pdf（9919KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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