Experimental investigation of cavity dynamics and pressure created by cumulative hydrodynamic ram

The impact of high-velocity projectile on fluid-filled containers can cause hydrodynamic ram (HRAM) events. When multiple projectiles impact, HRAM effect is superimposed. In this paper, we presented the experimental results of cavity dynamic, pressure-time histories, and impulse-time histories caused by single and double projectiles impacting water-filled containers. •Experiments on single and double projectile impacting on fluid-filled containers were conducted.•The cavity dynamic and related pressure-time histories,of these two cases were compared.•It is found that the impulse is approximately a linear superposition of the values for each projectile.