Ignition Characteristics of Nitramine Propellant by Copper Wire and Titanium Wire Electric Explosion
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摘要:为了研究铜丝、钛丝电爆炸对硝胺发射药的点火作用机理，搭建了金属丝电爆炸点火试验平台，采用不同直径的铜丝、钛丝对硝胺发射药进行了电爆炸点火试验，并对电爆炸产物及样品进行了形貌分析。结果表明：铜丝、钛丝电爆炸总的燃烧持续时间分别约为38.1ms、25.1ms；随着铜丝直径的增加，电爆炸后铜颗粒的直径增大，发射药表面烧蚀坑的数量增加、直径增大，最大分布数量的烧蚀坑直径均约为7μm；钛丝电爆炸的颗粒产物形态较难控制，发射药表面出现了大量的相互重叠与嵌套的烧蚀坑，改变钛丝直径不能有效地调节颗粒的大小和数密度的分布；金属丝电爆炸等离子体对硝胺发射药的点火过程符合五阶段点火机理。
Abstract:In order to study the ignition mechanism of copper wire and titanium wire electric explosion on nitramine propellant, a metal wire electric explosion ignition test platform was set up. The electric explosion ignition tests of nitramine propellant were carried out with copper wire and titanium wire of different diameters, and the morphology of electric explosion products and samples were analyzed. The results show that the total combustion duration of copper wire and titanium wire electric explosion is about 38.1ms and 25.1ms, respectively.With the increase of copper wire diameter, the diameter of copper particles increases, the density and diameter of ablation pits on the surface of propellant also increase (the maximum number of distribution is ~ 7μm in diameter). It is difficult to control the shape of the particles in the electric explosion of titanium wire, a large number of overlapping and nested ablation pits appear on the surface of the propellant. The size and number density distribution of particles cannot be effectively adjusted by changing the diameter of titanium wire. The ignition process of nitramine propellant by wire explosive plasma conforms to the five-stage ignition mechanism.
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