Study on the effects of combustion characteristics of pyrotechnic charges on pyrotechnic shocks  

作　　者：Jingcheng Wang Shihui Xiong Huina Mu Xiaogang Li Yuquan Wen 

机构地区：[1]State Key Laboratory of Explosion Science and Safety Protection,Beijing Institute of Technology,Beijing 100081,China [2]CAS Key Laboratory of Mechanical Behavior and Design of Materials,Department of Modern Mechanics,University of Science and Technology of China,Hefei 230027,China

出　　处：《Defence Technology(防务技术)》2025年第4期79-98,共20页Defence Technology

摘　　要：This study calculates the combustion characteristics of various gas-generating and micro gas pyrotechnic charges,including aluminium/potassium perchlorate,boron/potassium nitrate,carbon black/potassium nitrate,and silicon-based delay compositions,using thermodynamic software.A multiphase flowthermal-solid coupling model was established,and the combustion process of the pyrotechnic charges within a closed bomb was simulated.The pyrotechnic shock generated by combustion was predicted.The combustion pressures and pyrotechnic shocks were measured.The simulation results demonstrated good agreement with experimental results.Additionally,the mechanism of shock generation by the combustion of pyrotechnic charges in the closed bomb was analyzed.The effects of the combustion characteristics of the pyrotechnic charges on the resulting pyrotechnic shocks were systematically investigated.Notably,the shock response spectrum of the gas-generating pyrotechnic charges is greater than that of the micro gas compositions at most frequencies,particularly in the mid-field pyrotechnic shocks(3e10 kHz).Furthermore,the pyrotechnic shocks increase approximately linearly with the impulse of the gas-generating pyrotechnic charges.

关 键 词：Pyrotechnic charges Pyroshock Closed bomb tests Combustion characteristics Multiphase flow-thermal-solid coupling 

分 类 号：TJ450.2[兵器科学与技术—火炮、自动武器与弹药工程]