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Ignition and Extinction of n‐Butyl Nitroxyethylnitramine‐Plasticized Polyethylene Glycol Propellants
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2020-06-10 , DOI: 10.1002/prep.201900425 Hong‐Min Shim 1 , Sung June Kim 1 , Byoung Sun Min 1
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2020-06-10 , DOI: 10.1002/prep.201900425 Hong‐Min Shim 1 , Sung June Kim 1 , Byoung Sun Min 1
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The ignition and extinction of n‐butyl nitroxyethylnitramine (BuNENA)‐plasticized polyethylene glycol (PEG) propellants were investigated with respect to the concentration of binder and the ratio of plasticizer to polymer (pl/po). A distinctive change in the ignition delay time (tign) of the propellants was found at a low pressure of 0.03 MPa, where tign increases as the binder concentration increases from 24 % to 32 % and decreases when the pl/po ratio reaches from 1 to 6. The kinetic analysis shows that the ignition delay of BuNENA‐PEG propellants is due to a high activation energy of a condensed phase accompanied by the reduction of NO in the gas phase that plays an important role in the formation of luminous flames. Furthermore, the BuNENA‐PEG propellants with a high concentration of binder or a low ratio of pl/po were found to result in a relatively high value of the pressure deflagration limit (PDL) under which steady combustion cannot occur. With regard to combustion stability, it seems that the BuNENA‐PEG propellants producing relatively large amounts of CO and H2 are easy to extinguish and exhibit significant delay in ignition at low pressure.
中文翻译：
正丁基硝基氧乙基硝胺增塑聚乙二醇推进剂的着火和消光
研究了正丁基硝氧乙基硝胺（BuNENA）增塑的聚乙二醇（PEG）推进剂的着火和消光的原因，包括粘合剂的浓度以及增塑剂与聚合物的比例（pl / po）。在0.03 MPa的低压下发现了推进剂点火延迟时间（t ign）的显着变化，其中t ign当粘合剂浓度从24％增加到32％时增加，而当pl / po比达到1到6时减少。动力学分析表明，BuNENA-PEG推进剂的着火延迟是由于凝聚相的高活化能引起的。伴随着气相中NO的减少，这在发光火焰的形成中起着重要作用。此外，发现具有高粘合剂浓度或低pl / po比的BuNENA-PEG推进剂会导致压力爆燃极限（PDL）的相对较高值，在该值下不会发生稳定燃烧。关于燃烧稳定性，似乎产生大量CO和H 2的BuNENA-PEG推进剂很容易熄灭，并且在低压下显示出明显的点火延迟。
更新日期：2020-06-10
中文翻译：
正丁基硝基氧乙基硝胺增塑聚乙二醇推进剂的着火和消光
研究了正丁基硝氧乙基硝胺（BuNENA）增塑的聚乙二醇（PEG）推进剂的着火和消光的原因，包括粘合剂的浓度以及增塑剂与聚合物的比例（pl / po）。在0.03 MPa的低压下发现了推进剂点火延迟时间（t ign）的显着变化，其中t ign当粘合剂浓度从24％增加到32％时增加，而当pl / po比达到1到6时减少。动力学分析表明，BuNENA-PEG推进剂的着火延迟是由于凝聚相的高活化能引起的。伴随着气相中NO的减少，这在发光火焰的形成中起着重要作用。此外，发现具有高粘合剂浓度或低pl / po比的BuNENA-PEG推进剂会导致压力爆燃极限（PDL）的相对较高值，在该值下不会发生稳定燃烧。关于燃烧稳定性，似乎产生大量CO和H 2的BuNENA-PEG推进剂很容易熄灭，并且在低压下显示出明显的点火延迟。
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