Influence of overdriven detonation on the energy release of aluminized explosives in underwater explosion.

This article focuses on investigating the influence of overdriven detonation (ODD) conditions on the explosion performance and afterburn reaction of aluminum (Al) particles in cyclotrimethylenetrinitramine (RDX)-based aluminized explosives through underwater explosion experiments. The study compares ordinary charge (OC) and inner/outer charge (IC) structures, demonstrating that ODD enhances shock wave peak pressure, impulse, and bubble pulsation energy, with these effects linked to the proportion and detonation velocity differences between the inner core and outer coat. A numerical model incorporating the Lezzi–Prosperetti bubble dynamics equation was developed and validated against experimental data, revealing that ODD raises the initial bubble pressure, thereby promoting the afterburn reaction during the accelerating expansion phase and increasing energy output, while having limited effect during the subsequent decelerating expansion. These findings provide a theoretical and experimental basis for optimizing the energy release and performance of aluminized explosives under varying detonation conditions.