通过封闭式炸弹试验中的性能建模了解烟火引发剂的老化特性

Seung‐gyo Jang, Dong‐seong Kim, Doo‐Hee Han
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引用次数: 0

摘要

我们利用 10 立方厘米封闭式炸弹试验(CBT),对存放了 11 年的电火花引发剂的自然老化特性进行了分析。在对比分析中,我们使用了 11 年前生产的其他三个批次的封闭式炸弹测试数据。值得注意的是,两个老化样品在最大压力和达到最大压力所需的时间方面表现出特殊现象,而这两项指标都是闭式炸弹试验的性能指标。与原始样品相比,两个老化样品达到最大压力所需的时间都有所增加。此外,一个老化样本的最大压力较高,而另一个样本的最大压力则明显低于原始样本。通过对三批参考样品和一批老化样品的测试结果进行统计分析,我们认为引发剂存在自然老化效应。与参考样品相比,达到最大压力所需时间的增加可归因于本燃烧模型中球形燃烧颗粒粒径分布增加的现象。此外,引发剂装料粘合剂的老化很可能会导致燃烧颗粒的尺寸相对增大,这是因为粘合剂随着时间的推移而硬化。为了解释 CBT 压力-时间曲线上的压力最初达到最大值而随后降低的现象,我们引入了冷凝的概念,即气相转变为液相和固相。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Understanding aging characteristics of a pyrotechnic initiator through performance modeling in Closed Bomb Tests
We conducted an analysis of the natural aging characteristics of an electric pyrotechnic initiator stored for 11 years, using 10‐cm3 Closed Bomb Tests (CBTs). For the comparative analysis, we utilized the closed bomb test data from other three batches that were tested 11 years ago when they were produced. Notably, two aged samples exhibited peculiar phenomena in terms of maximum pressure and the time taken to reach it, both of which are the performance indicators of Closed Bomb Tests. The time taken to reach maximum pressure increased in both aged samples compared to the pristine samples. Additionally, while one aged sample demonstrated a higher maximum pressure, the other displayed a significantly lower value compared to the pristine ones. Through statistical analysis of test results from three batches of the reference samples and one batch of aged samples led us to propose the existence of a natural aging effect on the initiator. The increase in time taken to reach maximum pressure compared to the reference samples can be attributed to the phenomenon of an increasing particle size distribution of spherical combustion particles in the present combustion model. Furthermore, the aging of the binder of the initiator charge likely contribute to a relative increase in the size of the combustion particles due to the binder hardening over time. To explain the phenomenon of the pressure initially reaches its maximum value on the CBT pressure‐time curve and subsequently decrease, we introduce the concept of condensation, where the gas phase transitions into liquid and solid phases.
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