火炸药学报2017，Vol.40Issue(1)：101-106,6.DOI:10.14077/j.issn.1007-7812.2017.01.020
低温撞击破碎高能发射药结构特征与高压燃烧性能研究
Study on the Structure Feature and High Pressure Combustion Performance of Fragmented High Energy Gun Propellants Prepared by Impact at Low Temperature
摘要
Abstract
DAGR125 and NR11 gun propellants with different fragmentation degree were prepared by impact of dropping hammer at-40℃.The fragmentation degree of the gun propellants was characterized by the absorption quality of dye (AQD);Combined with the closed high pressure bomb experiment, the relationship of the structure feature and combustion feature of fragmented gun propellants at high pressure was analyzed.The results show that the change rate of dynamic vivacity occurs a mutation in the initial combustion stage with increasing the quality of small particles gradually.When the fragmentation degree is low, the initial dynamic vivacity and the AQD can be used to measure the initial combustion surface and the fragmentation degree of the gun propellants;When the fragmentation degree is high enough, the initial dynamic vivacity measured by traditional method is obviously lower than actual value, and it is unsuitable to represent the initial combustion surface, however the AQD method is more accurate.The change rule of initial dynamic vivacity shows that the fragmentation degree of propellant grains increases rapidly when the height of dropping hammer is greater than 60cm.The change in dynamic vivacity reveals that the whole combustion process of DAGR125 and NR11 fragmented gun propellants converts from progressive combustion to reduced combustion when the height of dropping hammer is greater than 23.0cm and 23.1cm, respectively.关键词
发射药/低温/落锤/撞击破碎/初始动态活度/密闭高压爆发器Key words
gun propellant/low temperature/dropping hammer/impact fragment/initial dynamic vivacity/closed high pressure bomb分类
军事科技引用本文复制引用
石先锐,贾永杰,胡睿,徐敏,焦旭英,许灿啟..低温撞击破碎高能发射药结构特征与高压燃烧性能研究[J].火炸药学报,2017,40(1):101-106,6.基金项目
国家"973"项目 （）
