Preliminary tests on thermal ignition of ADN-based liquid monopropellants

Wilhelm Marius; Negri Michele; Ciezki Helmut; Schlechtriem Stefan

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Preliminary tests on thermal ignition of ADN-based liquid monopropellants

机译：ADN基液体单推进剂热着火的初步测试

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Preliminary tests on thermal ignition with ADN-based liquid monopropellants FLP-106 and LMP-103S have been conducted using two thermal ignition methods. Investigated thermal ignition methods were based on a pilot flame igniter and a glow plug. Results indicated that ADN-based propellants offer different behavior compared to conventional monopropellants. At first the propellants needed to be conditioned by evaporating the water portion. In this phase the heat transfer from the igniters to the propellant played a major role for the ignition time delay. After evaporation of the water the propellant decomposition could be initiated. It was found that with thermal igniters the internal energy feedback from decomposing propellant portions was insufficient to condition newly injected propellant portions upstream. An external heat feedback is necessary to sustain water evaporation and hence propellant combustion. While tests with a pilot flame igniter and a cylindrical combustion chamber were not successful, glow plug ignition showed satisfying decomposition and ignition behavior. With the conducted preliminary thermal ignition tests a profound knowledge could be gained concerning propellant ignition behavior of FLP-106 and LMP-103S. Furthermore similarities and differences of both propellants could be analyzed and allow improvement of thermal ignition methods for future research activities.

机译：已经使用两种热点火方法对基于ADN的液体单推进剂FLP-106和LMP-103S进行了热点火的初步测试。研究的热点火方法基于引燃火焰点火器和电热塞。结果表明，与传统的单推进剂相比，基于ADN的推进剂具有不同的行为。首先，需要通过蒸发水部分来调节推进剂。在此阶段，从点火器到推进剂的热传递对点火时间延迟起着重要作用。水蒸发后，可以开始推进剂分解。已经发现，利用热点火器，来自分解推进剂部分的内部能量反馈不足以在上游调节新注入的推进剂部分。需要外部热反馈来维持水的蒸发，从而维持推进剂燃烧。尽管没有使用引燃火焰点火器和圆柱形燃烧室进行测试，但电热塞点火显示出令人满意的分解和点火行为。通过进行初步的热点火试验，可以获得有关FLP-106和LMP-103S的推进剂点火行为的深刻知识。此外，可以对两种推进剂的异同进行分析，并为将来的研究活动改进热点火方法。

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来源
《Acta astronautica》 |2019年第5期|388-396|共9页
作者
Wilhelm Marius; Negri Michele; Ciezki Helmut; Schlechtriem Stefan;
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作者单位

German Aerosp Ctr DLR, Inst Space Prop, D-74239 Hardthausen, Germany;

German Aerosp Ctr DLR, Inst Space Prop, D-74239 Hardthausen, Germany;

German Aerosp Ctr DLR, Inst Space Prop, D-74239 Hardthausen, Germany;

German Aerosp Ctr DLR, Inst Space Prop, D-74239 Hardthausen, Germany;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
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Preliminary tests on thermal ignition of ADN-based liquid monopropellants

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