Analysis on Explosion Energy of Aluminum Fiber Explosive on Underwater Detonation

Pressure-time curves were measured in different regions by underwater explosion experiments of aluminum fiber explosive based on RDX and traditional aluminized explosive base on RDX.Explosion energy of aluminum fiber explosive and aluminized explosive were obtained by analyzing the curves,and the difference between them was analyzed and explosion energy of aluminized explosive was regarded as reference values of explosion energy of aluminum fiber explosive.Compared to aluminized explosive,the peak pressure and the shock wave impulse of aluminum fiber explosive are decreased,the specific shock wave energy decreases by 11%-22%,the specific bubble energy decreases by 11%-15%,the specific explosion energy decreases by 11%-18%.The specific explosion energy is 73%-82% of explosion heat,which is lower than that of aluminized explosive(89%-94%).The results show that explosion energy of aluminum fiber explosive lower than the reference values because the diameter of aluminum fiber is too big to react fully and aluminum fiber which is made under high temperature contains high content of Al2O3.