镁粉/氢杂化物的爆炸是一个复杂的反应过程,会比单一可燃介质的爆炸造成更严重的危害。对混合爆炸机理的研究可为此类事故的预防提供相应的参考。采用 20L 爆炸装置研究其爆炸机理,结果表明,混合爆炸中的镁颗粒经历了均匀的收缩核心反应。研究发现,在一定条件下,混合体的爆炸压力曲线会呈现双峰结构,因此本文将单独探讨。当混合动力系统处于“贫氧”状态时,第一阶段的爆炸特性参数会随着可燃材料的增加而降低。并且气态产品中的氢含量和耗氧量也逐渐增加,还发现了未反应的镁颗粒。在“富氧”状态下,情况正好相反,固体爆炸产物中的立方颗粒数量和氧化度随着可燃材料的增加而增加。此外,即使在“富氧”条件下,氢仍保留在杂化物的气态产物中。
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Study on explosion characteristic parameters and induction mechanism of magnesium powder/hydrogen hybrids
The explosion of magnesium powder/hydrogen hybrid is a complex reaction process, which will cause more serious harm than the explosion of a single combustible medium. The research on the mechanism of the hybrid explosion can provide corresponding reference for the prevention of such accidents. A 20L explosion device was used to study its explosion mechanism, and the results show that the magnesium particles in the hybrid explosion underwent homogeneous shrinking core reaction. It is found that the explosion pressure curve of the hybrid will appear bimodal structure under certain conditions, so this paper will explore it separately. When the hybrid system is in the “oxygen-poor” state, the explosion characteristic parameters of the first stage will decrease with the increase of combustible materials. And the hydrogen content and oxygen consumption in the gaseous products are also increase gradually, and unreacted magnesium particles are also found. In the “oxygen-rich” state, the opposite is true, and the number of cubic particles and the oxidation degree in the solid explosion products increasing with the increasing combustible materials. In addition, even under “oxygen-rich” conditions, hydrogen remains in the gaseous product of the hybrid.