Abstract

In this paper, confined explosions of HMX-based aluminized explosives in a spherical chamber are studied. The effects of aluminum particles on the afterburning reaction and explosive performance are obtained by changing the size of the particles and the gas environment. The results show that the concentration of oxygen in air is not sufficient to support complete combustion of aluminum particles. The estimated oxidation rate of aluminum particles is 87–93%, and it tends to decrease with increasing particle size. Part of aluminum particles oxidize with detonation products, and the reaction can last for hundreds of microseconds. However, the degree of oxidation between the large-sized aluminum particles and detonation products is small. A new method is used to estimate the initial energy of detonation by observing the time difference between sensing the initial light and the pressure wave. This method leads to a conclusion that some of the aluminum particles are oxidized during detonation and provide additional energy to the primary blast wave. Small micron-sized aluminum particles in the range of 48.9 nm to 46.7 \(\mu\)m extend the duration of the fireball.

中文翻译：

---

粒径和气体环境对含铝HMX炸药的后燃反应和爆炸性能的影响

摘要

本文研究了球形腔室内HMX镀铝炸药的局限爆炸。铝粒子对后燃反应和爆炸性能的影响是通过改变粒子的大小和气体环境而获得的。结果表明，空气中的氧气浓度不足以支持铝颗粒的完全燃烧。铝颗粒的氧化率估计为87-93％，并且随着颗粒尺寸的增加而趋于降低。一部分铝颗粒被爆炸产物氧化，反应可持续数百微秒。然而，大尺寸铝颗粒和爆炸产物之间的氧化程度很小。通过观察感测到的初始光和压力波之间的时间差，使用一种新的方法来估计爆炸的初始能量。该方法得出的结论是，一些铝颗粒在爆炸过程中被氧化，并为一次爆炸波提供了额外的能量。48.9 nm至46.7 nm范围内的微米级小铝颗粒\（\ mu \） m延长了火球的持续时间。