Numerical simulation on initial stage of liquid dispersed under explosion drive

For fuze-warhead cooperation design on fire extinguishing warhead, characteristics on liquid (based-water extinguisher) dispersed under explosion drive were studied. The numerical simulation model was built based on representative fire extinguishing warhead structure. The numerical simulation was done by LS-DYNA program. The influence rule about loading coefficient (drive charge divide liquid mass) to the breach time on shell, the movement speed on liquid/air interface at the shell breach initial phase, and the movement characteristic on liquid-air interface after shell breach were obtained. With the same simulation condition, the experiment on based-water extinguisher dispersed under explosion drive was done. For different loading coefficients, the liquid/air interface movement speed at shell breach initial phase was gained. The results between experiment and numerical simulation were in good agreement, which indicates that the numerical simulation method was correct and effective. The research outcomes may provide important reference to investigate the relevant problem.