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Experimental Study on the Characteristics of Liquid Spurt Caused by Hydrodynamic Ram

ANRAN CHEN, XIANGDONG LI, LANWEI ZHOU, YANGZIYI JI

Abstract


As the necessary and flammable components of the battlefield moving targets, the fuel tank is attacked primarily by the high-velocity penetrator (fragment, projectile, and bullet). Under the impact of the high-velocity penetrator, hydrodynamic ram (HRAM) occurs in the fuel tank, and this event may lead to the fuel spurt. The fuel exiting from the penetration orifice could be highly atomized by the disturbance of aerodynamic, which makes the fuel easily to ignition and fire, thus affecting the survivability of battled field targets. In this paper, the experiment of high-velocity fragments impacting the liquid-filled containers have been conducted to observe and record the process of the liquid spurt. The characteristics of the liquid spurt such as the velocity and the cone angle have been investigated. It has been found that both the impact velocity of the fragment and the shape of the penetration orifice affect the characteristics of the liquid spurt. The expansion and collapse of the cavity are the direct causes of the liquid spurt. Moreover, the relationship between the velocity of the liquid spurt and the pressure in the liquid has been analyzed. The experimental basis for the prediction of fuel spurt distribution caused by high-velocity penetrator impacting the fuel tank could be provided in this study results.


DOI
10.12783/ballistics2019/33219

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