Numerical simulation of high speed vertical water entry motion of multi environment ammunition

DOI:	10.11809/bqzbgcxb2023.05.002
Keywords:	multi environment ammunition; high speed water entry; super cavitation; ammunition design
Abstract:	This paper uses ANSYS/LS DYNA software to carry out the numerical simulation of the high speed vertical water entry process of trans medium ammunition. By comparing with the numerical simulation results of the water entry process of standard rifle cartridges, the change laws of cavitation morphology, ballistic trajectory and hydrodynamic characteristics of multi environment ammunition vertically entering water at a high speed are analyzed. The results show that the design scheme of the multi environment ammunition with flat head multi gradient cone and cavitation slots is beneficial to reducing the pressure of the warhead in the water entry process, and can form supercavitation wrapped around the warhead. It also reduces water entry resistance of the warhead during the trans medium process and increases its effective underwater range, which has obvious advantages in underwater warfare. The research results can enrich ammunition design theories and provide theoretical reference for weapon optimization.
Issue:	Vol. 44 No. 5 (2023)
Published:	2023-05-28
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