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Supercavitating flow around high-speed underwater projectile near free surface induced by air entrainment
Xu C(徐畅); Huang J(黄荐); Wang YW(王一伟); Wu XC(吴小翠); Huang CG(黄晨光); Wu XQ(吴先前)
2018-03-01
发表期刊AIP Advances
卷号8期号:3页码:035016
ISSN2158-3226
摘要

Cavitating flow near free surface is a complicated issue and may provide new inspiration on high-speed surface cruising. This study observes stable supercavitating flow as a new phenomenon in a launch experiment of axisymmetric projectile when the upper side of the projectile coincides with the free surface. A numerical approach is established using large eddy-simulation and volume-of-fluid methods, and good agreements are achieved between numerical and experimental results. Supercavity formation mechanism is revealed by analyzing the experiment photographs and the iso-surface of 90% water volume fraction in numerical results. The entrainment of a large amount of air into the cavity can cause the pressure inside the cavity to similarly increase with the pressure outside the cavity, which makes the actual cavitation number close to zero and is similar to supercavitation. Cases with various headforms of the projectile and cavitation numbers on the cavitating flow, as well as the drag reduction effects are further examined. Results indicate that the present strategy near the free surface could possibly be a new effective approach for high-speed cruising after vigorous design optimization in the future. (c) 2018 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license.

DOI10.1063/1.5017182
收录类别SCI
语种英语
WOS记录号WOS:000428528400016
论文分区Q3
力学所作者排名1
引用统计
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77664
专题流固耦合系统力学重点实验室
推荐引用方式
GB/T 7714
Xu C,Huang J,Wang YW,et al. Supercavitating flow around high-speed underwater projectile near free surface induced by air entrainment[J]. AIP Advances,2018,8(3):035016.
APA Xu C,Huang J,Wang YW,Wu XC,Huang CG,&Wu XQ.(2018).Supercavitating flow around high-speed underwater projectile near free surface induced by air entrainment.AIP Advances,8(3),035016.
MLA Xu C,et al."Supercavitating flow around high-speed underwater projectile near free surface induced by air entrainment".AIP Advances 8.3(2018):035016.
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