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Volume 42 Issue 11
Nov.  2016
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Journal of Beijing University of Aeronautics and Astronautics  > 2016  >  42(11): 2386-2394.
SONG Wuchao, WANG Cong, WEI Yingjie, et al. Experiment of cavity and trajectory characteristics of oblique water entry of revolution bodies[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(11): 2386-2394. doi: 10.13700/j.bh.1001-5965.2015.0690(in Chinese)
Citation: SONG Wuchao, WANG Cong, WEI Yingjie, et al. Experiment of cavity and trajectory characteristics of oblique water entry of revolution bodies[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(11): 2386-2394. doi: 10.13700/j.bh.1001-5965.2015.0690(in Chinese)
shu

Experiment of cavity and trajectory characteristics of oblique water entry of revolution bodies

doi: 10.13700/j.bh.1001-5965.2015.0690

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

  • Received Date: 23 Oct 2015
  • Rev Recd Date: 13 May 2016
  • Publish Date: 20 Nov 2016
    Abstract
  • Studies of the oblique water entry of revolution bodies are conducted. By the experiment of revolution body velocity water entry with different velocities and angles, cavity evolution on revolution bodies is discussed, including formation, development and pinch-off of oblique entry. The influence of water entry velocity and angle on the cavities, revolution body velocity, pitching angle and drag coefficients was experimentally obtained. The experiments show that at the moment when the cavity is pinched off, the length and largest diameters of the cavity, and the depth of the closure point are larger as the velocity of revolution bodies increases. The cavity closure time increases slightly with the increase of revolution body velocity. When the velocity of revolution bodies is larger, the pitching angle and angle velocity are smaller. With the increase of water-entry angle of revolution bodies, the diameter of the cavity and the velocity of revolution bodies gradually become smaller, but the drag coefficients become larger.

     

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