International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
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Numerical and experimental study of cone-headed projectile entering water vertically based on MMALE method

  • Cao, Miaomiao (State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology) ;
  • Shao, Zhiyu (State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology) ;
  • Wu, Siyu (State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology) ;
  • Dong, Chaochao (State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology) ;
  • Yang, Xiaotian (State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology)
  • Received : 2021.09.06
  • Accepted : 2021.11.01
  • Published : 2021.11.30
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Abstract

The water entry behaviors of projectiles with different cone-headed angles were studied numerically, experimentally and theoretically, mainly focusing on the hydrodynamic impact in the initial stage. Based on MMALE algorithm, it was proposed a formula of impact deceleration, which relied on the initial entry velocity and cone-headed angle. Meanwhile, in order to verify the validity of the simulation model, experiments using accelerometer and high-speed camera were carried out, and their results were in a good agreement with simulation results. Also, theoretical calculation results of cavity diameter were compared with experiments and simulation results. It was observed that the simulation method had a good reliability, which would make forecast on impact deceleration in an engineering project.

Keywords

Acknowledgement

We are grateful to colleagues from State Key Laboratory of Explosion Science and Technology, who provided us support during the field experiment of this work.

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