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Volume 41 Issue 8
Aug.  2015
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Journal of Beijing University of Aeronautics and Astronautics  > 2015  >  41(8): 1443-1450.
CHEN Chen, MA Qingpeng, WEI Yingjie, et al. Effects of operating pressure on high-speed projectile's water-entry flow[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(8): 1443-1450. doi: 10.13700/j.bh.1001-5965.2014.0594(in Chinese)
Citation: CHEN Chen, MA Qingpeng, WEI Yingjie, et al. Effects of operating pressure on high-speed projectile's water-entry flow[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(8): 1443-1450. doi: 10.13700/j.bh.1001-5965.2014.0594(in Chinese)
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Effects of operating pressure on high-speed projectile's water-entry flow

doi: 10.13700/j.bh.1001-5965.2014.0594
  • 1.

    School of Astronautics, Harbin Institute of Technology, Harbin 150001, China

  • 2. Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China

  • Received Date: 25 Sep 2014
  • Publish Date: 20 Aug 2015
    Abstract
  • In order to research the effects of operating pressure on the projectile's water-entry flow, numerical simulation for process of the high-speed water-entry induced by the cylinder body with a cone head was performed in the way of volume of fluid (VOF) model. Results of the velocity, depth and cavity shape of projectile were achieved and contrasted with the theoretical results obtained by Newton's second law of motion and the literature to verify the correctness of the numerical simulation method. Based on the method, processes with a series of operating pressure were analyzed. Results show that the effects of operating pressure on the phenomena, such as the spatter above the free liquid surface, the cavity surface closure time and the cavitation inside the cavity are great. With the operating pressure being higher, the cavity diameter near the free surface becomes smaller; the cavitation inside is more marked; the time for surface closure happens earlier.

     

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