探索添加剂对电控固体推进剂点火、燃烧和熄灭的影响

Sean Whalen, Emily Sellards, Bradley Gobin, Gregory Young
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引用次数: 0

摘要

通过小规模实验研究了添加剂对电控固体推进剂分解和燃烧特性的影响。在聚氧化乙烯和高氯酸锂推进剂中研究了炭黑和铝添加剂。添加剂用于改善电压响应,并表征了它们对点火和燃烧的影响。数据显示,导电添加剂可以减轻溶剂蒸发造成的固相电导率损失,而且点火延迟会随着电压和固相电导率的提高而减小。稳态燃烧实验表明,推进剂的电分解比纯热刺激进行得更快,这说明了电化学在 ECSP 燃烧中的重要性。圣罗伯特燃烧关系总结了压力和电压对燃烧速率的综合影响。回归率随施加的电压和压力而增加。与纯 PEO/LP 推进剂相比,添加了炭黑添加剂的推进剂的压力爆燃极限明显降低,而添加 10% 的铝不会影响压力爆燃极限。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exploring the influence of additives on the ignition, combustion and quenching of electrically controlled solid propellants
The influence of additives on the decomposition and combustion characteristics of electrically controlled solid propellants was investigated through small scale experiments. Carbon black and aluminum additives were explored in a polyethylene oxide, lithium perchlorate propellant. Additives were used to improve the voltage response and their impact on ignition and combustion was characterized. The data showed that conductive additives can mitigate the loss of solid phase conductivity through solvent evaporation and that ignition delay decreases with higher voltage and solid phase conductivity. Steady‐state combustion experiments showed that electrical decomposition of the propellants proceeded more rapidly than a purely thermal stimulus illustrating the importance of electrochemistry in ECSP combustion. The combined effects of pressure and voltage on combustion rates were summarized in Saint‐Robert's burn relations. The regression rates increased with both applied voltage and pressure. The pressure deflagration limit of propellants with the carbon black additive was significantly reduced compared to a neat PEO/LP propellant, whereas the addition of 10 % aluminum did not affect the pressure deflagration limit.
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