Effect of Al/O ratio on detonation performance and underwater explosion of RDX-based aluminized explosive

The detonation parameters of RDX-based aluminized explosive were measured by test, and the test result was verified by KHT code. The influence law of Al/O ratio on detonation pressure, detonation velocity and heat was analyzed. Underwater explosion experiments were carried out on shock wave propagation and bubble pulse of 1 kg cylindrical RDX-based aluminized explosive under water 4.7 m. The coefficients of similitude equation for peak pressure and attenuation time constant were fitted. The study indicates that the detonation pressure and velocity reduce linearly with the increasing of Al/O ratio and the detonation heat achieves a maximum value when Al/O ratio equals to 0.997. When Al/O ratio equals to 0.366, the peak pressure and shock wave energy reach the maximum value, but the shock wave impulse and flux density reach the maximum value when Al/O ratio equals to 0.633, and the first bubble pulsation period and radius reach the maximum values when Al/O ratio equals to 0.997.