International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
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Influence of head structure on hydrodynamic characteristics of transonic motion projectiles

  • Wang, Rui (Northwest Institute of Mechanical and Electrical Engineering) ;
  • Yao, Zhong (Northwest Institute of Mechanical and Electrical Engineering) ;
  • Li, Daqin (School of Mechanical Engineering, Beijing Institute of Technology) ;
  • Xu, Baocheng (Northwest Institute of Mechanical and Electrical Engineering) ;
  • Wang, Jiawen (Northwest Institute of Mechanical and Electrical Engineering) ;
  • Qi, Xiaobin (Northwest Institute of Mechanical and Electrical Engineering)
  • Received : 2019.04.29
  • Accepted : 2020.05.04
  • Published : 2020.12.31
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Abstract

The hydrodynamic characteristic of transonic motion projectiles with different head diameters are investigated by numerical simulation. Compressibility effect in liquid-phase water are modeled using the Tait state equation. The result shows that with increasing of velocity the compression waves transfer to shock waves, which cause the significant increasing of pressure and decreasing the dimensions of supercavities. While the increasing of head diameter, the thickness, the vapor volume fraction and the drag coefficient of supercavities are all enhanced, which is conducive to the stability of transonic-speed projectiles. The cavity dynamics of the different head projectiles are compared, and the results shows when Mach number is in high region, the truncated cone head projectile is enveloped by a cavity which results in less drag and better stability.

Keywords

Acknowledgement

This work was supported by the Natural Science Foundation of Shaanxi Province (Grant No. 2019JQ-944). The Authors acknowledge them for their sponsorship.

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