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首页> 外文期刊>Combustion and Flame >Influence of iron oxide on thermal decomposition behavior and burning characteristics of ammonium nitrate/ammonium perchlorate-based composite propellants
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Influence of iron oxide on thermal decomposition behavior and burning characteristics of ammonium nitrate/ammonium perchlorate-based composite propellants

机译：氧化铁对硝酸铵/高氯酸铵基复合推进剂热分解行为和燃烧特性的影响

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摘要

The thermal decomposition behavior and burning characteristics of ammonium nitrate(AN)/ammonium perchlorate(AP) propellants supplemented with Fe2O3 were investigated. Based on these data, the performance differences between the propellants with Fe2O3 and those without Fe2O3 were investigated to reveal the influence of Fe2O3 on the thermal decomposition behavior and burning characteristics of AN/AP-based composite propellants. TG-DTA showed the peak temperature and temperature range of thermal decomposition due to AN decomposition to be independent of the presence of Fe2O3. The peak and the offset temperature of thermal decomposition due to AP decomposition decreased owing to the addition of Fe2O3, while the onset temperature did not vary. The burning rate of the AN/AP propellant was increased by the addition of Fe2O3; the effect of Fe2O3 on increasing the burning rate was influenced by the type of oxidizer, AP content in the oxidizer (xi), and AP size. Furthermore, Fe2O3 allowed the suppression of the remarkable heterogeneity of the combustion wave of the AN/AP propellant without Fe2O3. The ignitability of the ANIAP propellant was improved by the addition of Fe2O3, except for the propellant with a xi of 0.4. The cause of depressed ignitability by the addition of Fe2O3 for the propellant with a xi of 0.4 is discussed based on thermogravimetry-differential thermal analysis, the visual observations of the unignited propellant surfaces, and the decomposition phenomena of the propellants using a high-temperature observation equipment. A large quantity of AN remained on the surface of the unignited propellant at 0.5 MPa. The cause of the depressed ignitability is that AN, AP, and HTPB do not simultaneously decompose and as a result AN remains on the burning surface. Thus, the burning surface of AN did not regress simultaneously with the burning surface of the AP-filled region, the matrix of AP, and HTPB. (C) 2018 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
机译：研究了添加Fe2O3的硝酸铵（AN）/高氯酸铵（AP）推进剂的热分解行为和燃烧特性。基于这些数据，研究了含Fe2O3的推进剂与不含Fe2O3的推进剂之间的性能差异，以揭示Fe2O3对AN / AP基复合推进剂的热分解行为和燃烧特性的影响。 TG-DTA显示出由于AN分解引起的热分解的峰值温度和温度范围与Fe 2 O 3的存在无关。由于添加了Fe2O3，AP分解引起的热分解峰和补偿温度降低，而起始温度没有变化。加入Fe2O3可以提高AN / AP推进剂的燃烧速率； Fe2O3对提高燃烧速度的影响受氧化剂的类型，氧化剂中的AP含量（xi）和AP尺寸的影响。此外，Fe2O3可以抑制不含Fe2O3的AN / AP推进剂燃烧波的显着异质性。通过添加Fe2O3可以改善ANIAP推进剂的可燃性，但xi值为0.4的推进剂除外。基于热重-差热分析，未点燃的推进剂表面的目视观察以及利用高温观察得出的推进剂的分解现象，讨论了通过添加Fe2O3来制备xi为0.4的推进剂而导致可燃性降低的原因。设备。在0.5 MPa时，大量的AN残留在未点燃的推进剂表面。可燃性降低的原因是AN，AP和HTPB不会同时分解，结果AN残留在燃烧表面上。因此，AN的燃烧表面不会与AP填充区域，AP矩阵和HTPB的燃烧表面同时退缩。 （C）2018年燃烧研究所。由Elsevier Inc.出版。保留所有权利。

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