Experimental Study on Electrical Ignition Characteristics of Ammonium Dinitramide based Propellant under Different Environmental Pressures,Propellants, Explosives, Pyrotechnics

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Experimental Study on Electrical Ignition Characteristics of Ammonium Dinitramide based Propellant under Different Environmental Pressures
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2020-04-17 , DOI: 10.1002/prep.201900234
Lei Li _{1,

2} , GuoXiu Li _{1,

2} , HongMeng Li _{1,

2} , ZhaoPu Yao ₃

Affiliation

Ammonium dinitramide (ADN)‐based thrusters have been successfully used in‐orbit, but they possess some problems such as catalyst deactivation at high combustion temperatures and the inability to cold start the engine during thruster operation. Thus, a new thermal ignition method using resistance ignition has been developed for ADN‐based liquid propellant. Experimental results showed that ADN‐based liquid monopropellant droplets could be ignited by resistance ignition at different pressures. Voltage only slightly affected the ignition delay time, combustion duration, and total reaction time at 150 kPa and 200 kPa. In contrast, increasing the environmental pressure effectively reduced the ignition delay time, combustion duration, and total reaction time. When passed through droplets, the current presented a three‐stage rapid decline, entered a stable stage, and finally declined again during droplet ignition and combustion. Furthermore, increasing the environmental pressure could reduce the required ignition energy.

中文翻译：

不同环境压力下双三酰胺铵基推进剂电点火特性的实验研究

基于二硝酰胺（ADN）的推进器已经在轨道上成功使用，但存在一些问题，例如在高燃烧温度下催化剂失活以及推进器运行期间无法冷启动发动机。因此，已经针对基于ADN的液体推进剂开发了一种使用电阻点火的新型热点火方法。实验结果表明，可以在不同压力下通过电阻点火来点燃基于ADN的液体单推进剂液滴。电压仅对点火延迟时间，燃烧持续时间以及150 kPa和200 kPa的总反应时间有轻微的影响。相反，增加环境压力有效地减少了点火延迟时间，燃烧持续时间和总反应时间。当通过液滴时，电流呈现出三个阶段的快速下降，进入稳定阶段，最后在液滴着火和燃烧期间再次下降。此外，增加环境压力会降低所需的点火能量。

更新日期：2020-04-17

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