ISSN 0253-2778

CN 34-1054/N

open
Free to Publish. Free to Read.
Open AccessOpen Access JUSTC Original Paper

Experimental research on the hydrodynamic processes of water exit and entry

  • College of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, China

Cite this:
https://doi.org/10.3969/j.issn.0253-2778.2015.06.007
  • Received Date: 23 September 2014
  • Accepted Date: 15 March 2015
  • Rev Recd Date: 15 March 2015
  • Publish Date: 30 June 2015
    Abstract

  • Abstract

    Using a pneumatic gun and a single stage light gas gun, the supercavitation phenomena during water entry and exit of high-speed bodies (slender bodies) were investigated experimentally. The flow fields were visualized by a high speed camera. The study shows that the trailing vortices consisting of small bubbles shed periodically behind a supercavity. During water exit, the bodies velocities decrease generally, but a short acceleration may occur when the water splash impacts on the bottom of the body. During water entry, the hydroballistics of the underwater body may change due to the asymmetric bubble shedding behind the body and the collision between the body and the cavitys wall. According to experimental results, the drag coefficient in water Cd was measured, and Cd≈07~12.

    Abstract

    Using a pneumatic gun and a single stage light gas gun, the supercavitation phenomena during water entry and exit of high-speed bodies (slender bodies) were investigated experimentally. The flow fields were visualized by a high speed camera. The study shows that the trailing vortices consisting of small bubbles shed periodically behind a supercavity. During water exit, the bodies velocities decrease generally, but a short acceleration may occur when the water splash impacts on the bottom of the body. During water entry, the hydroballistics of the underwater body may change due to the asymmetric bubble shedding behind the body and the collision between the body and the cavitys wall. According to experimental results, the drag coefficient in water Cd was measured, and Cd≈07~12.
    • FullText(HTML)
  • loading
    • References(12)
  • [1]
    Waugh J G, Stubstad G W. Hydroballistic Modeling [M]. Washington DC: US Government Printing Office, 1975.
    [2]
    Hrubes J G. High-speed imaging of supercavitating underwater projectiles[J]. Exp Fluids, 2001, 30: 57-64.
    [3]
    罗格维诺维奇T B. 自由边界流动的水动力学[M]. 施红辉,译. 上海：上海交通大学出版社，2012.
    [4]
    Vlasenko Y D. Experimental investigations on high-speed unsteady supercavitating flows[C]//Proc Third International Symposium on Cavitation. Grenoble, France, 1998: 39-44.
    [5]
    Shi Honghui, Luo Xisheng. Compressible and High-Speed Multiphase Flows[M]. Hefei: The University of Science and Technology of China Press, 2014.
    施红辉，罗喜胜. 可压缩性和高速多相流动[M]. 合肥：中国科学技术大学出版社，2014.
    [6]
    Lu Chuanjing, Li Jie. Research on the collapse process and characteristics of water-exit cavity of underwater vehicle[C]//Proceedings of the 11th National Conference on Hydrodynamics & 24th National Symposium on Hydrodynamics and Commemoration of the 110th Anniversary of Zhou Peiyuans Birth. Beijing: Ocean Press, 2012: 54-67.
    鲁传敬, 李杰. 水下航行体出水空泡溃灭过程及其特性研究[C]//第十一届全国水动力学学术会议暨第二十四届全国水动力学研讨会并周培源教授诞辰110周年纪念大会文集. 北京: 海洋出版社, 2012: 54-67.
    [7]
    Shi H H, Zhou H L, Hu J H, et al. Experimental research on supercavitation flows during water exit[C]//Proceedings of the 8th International Symposium on Cavitation. Singapore, 2012: 885-889.
    [8]
    Shi H H, Zhang X P, Wu Y, et al. Supercavitation phenomenon during water exit and water entry of a fast slender body[C]//Proceedings of the 28th International Symposium on Shock Waves. Heidelberg: Springer, 2012:15-20.
    [9]
    Luo Jinling, Mao Hongyu. Research on aerodynamics and hydrodynamics in exiting water process of missile[J]. Tactical Missile Technology, 2004(4): 23-25.
    罗金玲, 毛鸿羽. 导弹出水过程中气/水动力学的研究[J]. 战术导弹技术, 2004(4): 23-25.
    [10]
    Wu Yan. Experimental investigation on the fluid dynamic processes of water exit and water entry of a fast slender body[D]. Hangzhou, China: Zhejiang Sci-Tech University, 2011.
    吴岩. 物体高速出入水实验装置研制及流场可视化[D]. 杭州: 浙江理工大学, 2011.
    [11]
    Zhou Haolei. Design of a launch system of high-speed underwater vehicles and research on the characteristics of supercavitation flows[D]. Hangzhou, China: Zhejiang Sci-Tech University, 2012.
    周浩磊. 水下高速航行体发射系统的设计及超空泡流场特性研究[D]. 杭州: 浙江理工大学, 2011.
    [12]
    Shi Honghui, Zhou Haolei, Wu Yan, et al. Experiments on water entry of high-speed slender body and the resulting supercavitation[J]. Chinese Journal of Theoretical and Applied Mechanics, 2012, 44(1): 49-55.
    施红辉, 周浩磊, 吴岩,等. 伴随超空泡产生的高速细长体入水实验研究[J]. 力学学报, 2012, 44(1): 49-55.
    • Supplements(0)
    • Related Articles
    • Track Citations
  • 加载中

Catalog

    |
    Get Citation
    PDF
    XML
    [1]
    Waugh J G, Stubstad G W. Hydroballistic Modeling [M]. Washington DC: US Government Printing Office, 1975.
    [2]
    Hrubes J G. High-speed imaging of supercavitating underwater projectiles[J]. Exp Fluids, 2001, 30: 57-64.
    [3]
    罗格维诺维奇T B. 自由边界流动的水动力学[M]. 施红辉,译. 上海：上海交通大学出版社，2012.
    [4]
    Vlasenko Y D. Experimental investigations on high-speed unsteady supercavitating flows[C]//Proc Third International Symposium on Cavitation. Grenoble, France, 1998: 39-44.
    [5]
    Shi Honghui, Luo Xisheng. Compressible and High-Speed Multiphase Flows[M]. Hefei: The University of Science and Technology of China Press, 2014.
    施红辉，罗喜胜. 可压缩性和高速多相流动[M]. 合肥：中国科学技术大学出版社，2014.
    [6]
    Lu Chuanjing, Li Jie. Research on the collapse process and characteristics of water-exit cavity of underwater vehicle[C]//Proceedings of the 11th National Conference on Hydrodynamics & 24th National Symposium on Hydrodynamics and Commemoration of the 110th Anniversary of Zhou Peiyuans Birth. Beijing: Ocean Press, 2012: 54-67.
    鲁传敬, 李杰. 水下航行体出水空泡溃灭过程及其特性研究[C]//第十一届全国水动力学学术会议暨第二十四届全国水动力学研讨会并周培源教授诞辰110周年纪念大会文集. 北京: 海洋出版社, 2012: 54-67.
    [7]
    Shi H H, Zhou H L, Hu J H, et al. Experimental research on supercavitation flows during water exit[C]//Proceedings of the 8th International Symposium on Cavitation. Singapore, 2012: 885-889.
    [8]
    Shi H H, Zhang X P, Wu Y, et al. Supercavitation phenomenon during water exit and water entry of a fast slender body[C]//Proceedings of the 28th International Symposium on Shock Waves. Heidelberg: Springer, 2012:15-20.
    [9]
    Luo Jinling, Mao Hongyu. Research on aerodynamics and hydrodynamics in exiting water process of missile[J]. Tactical Missile Technology, 2004(4): 23-25.
    罗金玲, 毛鸿羽. 导弹出水过程中气/水动力学的研究[J]. 战术导弹技术, 2004(4): 23-25.
    [10]
    Wu Yan. Experimental investigation on the fluid dynamic processes of water exit and water entry of a fast slender body[D]. Hangzhou, China: Zhejiang Sci-Tech University, 2011.
    吴岩. 物体高速出入水实验装置研制及流场可视化[D]. 杭州: 浙江理工大学, 2011.
    [11]
    Zhou Haolei. Design of a launch system of high-speed underwater vehicles and research on the characteristics of supercavitation flows[D]. Hangzhou, China: Zhejiang Sci-Tech University, 2012.
    周浩磊. 水下高速航行体发射系统的设计及超空泡流场特性研究[D]. 杭州: 浙江理工大学, 2011.
    [12]
    Shi Honghui, Zhou Haolei, Wu Yan, et al. Experiments on water entry of high-speed slender body and the resulting supercavitation[J]. Chinese Journal of Theoretical and Applied Mechanics, 2012, 44(1): 49-55.
    施红辉, 周浩磊, 吴岩,等. 伴随超空泡产生的高速细长体入水实验研究[J]. 力学学报, 2012, 44(1): 49-55.
    Recommended articles
    TrendMD
    Volume 45 Issue 6 page: 470-475
    Cover

    Article Metrics

    Article views (28) PDF downloads(77)
    Proportional views

    Copyright © Editorial Office of JUSTC, All Rights Reserved. 皖ICP备05002528号

    Supported by: Beijing Renhe Information Technology Co. Ltd    

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return