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首页> 外文期刊>Combustion Science and Technology >Thermal decomposition and combustion characteristics of HTPB-coarse AP composite solid propellants catalyzed with Fe_2O_3
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Thermal decomposition and combustion characteristics of HTPB-coarse AP composite solid propellants catalyzed with Fe_2O_3

机译：Fe_2O_3催化的HTPB粗AP复合固体推进剂的热分解和燃烧特性

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摘要

Many factors and their mutual interactions induce complexity in the combustion of hydroxyl-terminated polybutadiene (HTPB)-ammonium perchlorate (AP)-ferric oxide (Fe2O3) composite solid propellant (CSP). Among them, we investigated exothermicity of coarse AP decomposition for thermal decomposition and high-pressure combustion of HTPB-AP. Thermal decomposition of coarse AP was characterized by high twin-peak exothermicity, while HTPB-AP decomposed in single-stage at 329 degrees C. Coarse AP improved thermal decomposition due to significant first-stage exothermicity. High exothermicity and predominance of coarse AP dominate thermal decomposition of CSP. Fe2O3 catalyzed decomposition of AP by shifting second exothermic peak to lower temperature and releasing more heat. Fe2O3 increased the burning rate of HTPB-AP and the highest burning rate was achieved for 1wt % nano-Fe2O3 of average size 4nm. Similar results for milli- (average size 200m) and micro-Fe2O3 (average size 2m) were recorded at higher concentrations. Exothermicity of coarse AP and catalytic activity of Fe2O3 on AP speed up subsurface processes and help in the enhancement of burning rates.
机译：许多因素及其相互影响导致羟基封端的聚丁二烯（HTPB）-高氯酸铵（AP）-三氧化二铁（Fe2O3）复合固体推进剂（CSP）的燃烧复杂性。其中，我们研究了粗AP分解对HTPB-AP的热分解和高压燃烧的放热性。粗AP的热分解以高双峰放热为特征，而HTPB-AP在329℃单级分解。粗AP由于明显的第一级放热而改善了热分解。高放热和粗AP占主导地位的CSP热分解。 Fe2O3通过将第二个放热峰移至较低的温度并释放更多的热量来催化AP的分解。 Fe2O3提高了HTPB-AP的燃烧速率，并且平均尺寸为4nm的1wt％纳米Fe2O3达到了最高的燃烧速率。在较高浓度下，对毫（平均尺寸为200m）和微量的Fe2O3（平均尺寸为2m）记录的结果相似。粗AP放热和Fe2O3对AP的催化活性加快了地下过程，并有助于提高燃烧速率。

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