Hot fragment conductive ignition of nitramine-based propellants
Hot fragment conductive ignition of nitramine-based propellants
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DOI：
10.2514/3.23903
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发表时间：
1995-07
影响因子：
1.9
通讯作者：
T. H. Huang;S. Thynell;K. Kuo
中科院分区：
文献类型：
--
作者：
T. H. Huang;S. Thynell;K. Kuo
聚能装药射流撞击过程中产生的热碎片可能会穿透弹壳并引起推进剂点燃。本研究的主要目的是更好地了解基于硝胺的 XM39 和 M43 推进剂的热碎片传导点火行为。筒的限制效应通过外壳来模拟，热解产物可以在外壳内积聚并显着增加压力。理论和实验都表明，点火阈值是约束的强函数。在低压下，XM39 推进剂更容易着火，因为其粘合剂分解比 M43 推进剂更放热。在允许室加压的高度受限条件下，M43 点火阈值变得低于 XM39 推进剂的点火阈值。着火阈值的降低主要是由CH2O和NO2之间的放热反应引起的，该反应在气体聚集条件下增强。
Hot fragments generated during the impact of shaped-charge jets may penetrate the cartridge casing and induce propellant ignition. The major objective of this study is to acquire a better understanding of hot fragment conductive ignition behavior of nitramine-bas ed XM39 and M43 propellants. The confinement effect of the cartridge is simulated by an enclosure within which the pyrolysis products can accumulate and significantly increase pressure. Both theory and experiments showed that the ignition threshold was a strong function of confinement. At low pressures, the XM39 propellant was more susceptible to ignition, because its binder decomposition is more exothermic than that of the M43 propellant. At highly confined conditions, which allow for chamber pressurization, the M43 ignition threshold became lower than that of XM39 propellant. The reduction of the ignition threshold is caused mainly by exothermic reactions between CH2O and NO2 species, which are enhanced under gas accumulation conditions.