Effects of Ammonium Perchlorate Particle Size, Ratio, and Total Contents on the Properties of a Composite Solid Propellant,Propellants, Explosives, Pyrotechnics

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Effects of Ammonium Perchlorate Particle Size, Ratio, and Total Contents on the Properties of a Composite Solid Propellant
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2020-07-16 , DOI: 10.1002/prep.202000055
Sungjun Park ₁ , Sunghan Choi ₁ , Kyungmin Kim ₁ , Woonjae Kim ₁ , Jungho Park ₁

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In this study, ammonium perchlorates (APs) with two or more different particle sizes were mixed to optimize the viscosity of the propellant slurry and the burn rate of the resulting solid composite propellants at various mixing ratios. First, to investigate the characteristics of bimodal AP, APs with 200 and 6 μm particles were used. The experimental results showed that the viscosity of the propellant mixture was excellent when the AP‐200 content, i. e., the AP with 200 μm particles, ranged from 55 to 70 wt%, and the burn rate increased with the increasing AP‐6 content. To investigate the characteristics of trimodal AP, three types of APs with 400, 200, and 6 μm particles were used. The findings revealed that the mixing ratio of the three types of APs most favorable to the rheological properties was approximately 1 : 1 : 1. In addition, although adjusting the ratio between large and small particles was desirable for changing the burn rate, varying the ratio between AP‐400 and AP‐200 did not significantly change the burn rate. Adjusting the AP‐6 ratio effectively changed the burn rate. The method of adjusting the AP contents, i. e., the solid contents of propellant, can effectively alter the viscosity and burn rate of propellant. When the total AP content was reduced, the burn rate decreased, but the overall propellant performance degraded. However, the performance parameters of the propellant, such as its density and specific impulse, could be improved by adding solid fuels, such as aluminum.

中文翻译：

高氯酸铵的粒径，比例和总含量对复合固体推进剂性能的影响

在这项研究中，将具有两种或更多种不同粒径的高氯酸铵（AP）进行混合，以优化推进剂浆液的粘度以及在各种混合比例下所得固体复合推进剂的燃烧速率。首先，为了研究双峰AP的特性，使用了具有200和6μm颗粒的AP。实验结果表明，当AP-200含量为i时，推进剂混合物的粘度极好。例如，具有200μm颗粒的AP的含量在55至70 wt％之间，并且燃烧速率随AP-6含量的增加而增加。为了研究三峰AP的特性，使用了三种类型的400、200和6μm颗粒的AP。研究结果表明，最有利于流变性能的三种AP的混合比约为1：1：1。尽管需要调整大小颗粒之间的比例来更改燃烧速率，但是改变AP-400和AP-200之间的比例并不会显着改变燃烧速率。调整AP-6比率可有效改变燃烧速率。调整AP内容的方法，即例如，推进剂的固体含量可以有效地改变推进剂的粘度和燃烧速率。当总AP含量减少时，燃烧速率降低，但整体推进剂性能下降。但是，可以通过添加固体燃料（例如铝）来改善推进剂的性能参数，例如密度和比冲量。调整AP-6比率可有效改变燃烧速率。调整AP内容的方法，即例如，推进剂的固体含量可以有效地改变推进剂的粘度和燃烧速率。当总AP含量减少时，燃烧速率降低，但整体推进剂性能下降。但是，可以通过添加固体燃料（例如铝）来改善推进剂的性能参数，例如密度和比冲量。调整AP-6比率可有效改变燃烧速率。调整AP内容的方法，即例如，推进剂的固体含量可以有效地改变推进剂的粘度和燃烧速率。当总AP含量减少时，燃烧速率降低，但整体推进剂性能下降。但是，可以通过添加固体燃料（例如铝）来改善推进剂的性能参数，例如密度和比冲量。

更新日期：2020-09-02

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