升温速率对JEO炸药烤燃响应特性的影响  

Effect of Heating Rates on the Cook⁃off Response Characteristics of JEO Explosive

作　　者：张烨[1] 王新宇[1] 徐文雨 王在成[1] 姜春兰[1] ZHANG Ye;WANG Xin-yu;XU Wen-yu;WANG Zai-cheng;JIANG Chun-lan(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《含能材料》2024年第11期1182-1193,共12页Chinese Journal of Energetic Materials

摘　　要：为研究JEO炸药(3-硝基-1,2,4-三唑-5-酮(NTO)/奥克托今(HMX)/添加剂)的烤燃响应特性,设计了炸药烤燃多点测温-测压实验系统,开展了5℃·min^(-1)和2℃·min^(-1)2种升温速率下的JEO炸药烤燃实验,获得了点火时间、点火温度、不同位置处炸药的温度历程和装置内部的压力历程,分析了升温速率对JEO炸药烤燃温度、压力变化和反应剧烈程度的影响。在实验研究的基础上,采用考虑压力对炸药热分解反应影响的炸药烤燃多相流物质输送模型,使用Fluent软件对不同升温速率下JEO炸药的烤燃热分解过程进行了数值模拟研究。研究结果表明,JEO炸药热分解反应在相变前较为缓慢,相变后反应速率加快,炸药温度升高加快、压力呈指数增长,直至点火,JEO炸药的点火温度约为220℃,在本实验的约束条件下响应等级为爆燃,具有良好的热安全性;随着升温速率的降低,JEO炸药的点火时间变长,点火位置由装药边缘移向中心,反应剧烈程度增加;点火前的热分解过程中只有少部分炸药发生了反应,大部分炸药在点火后的燃烧阶段发生反应。To investigate the cook-off response characteristics of JEO explosive(NTO/HMX/additives),an experimental system for multi-point temperature and pressure measurements during the cook-off process of explosive was devised.The cook-off experiments of JEO explosive were conducted at two different heating rates of 5℃·min^(-1)and 2℃·min^(-1)to obtain the ignition time,ignition temperature,temperature history at different positions within the explosive,and pressure evolution inside the device.The effect of heating rates on temperature and pressure variations and reaction intensity during the cook-off process of JEO explosive was analyzed.Furthermore,based on the experimental research,a multiphase flow species transport model for explosive cook-off was adopted considering the influence of pressures on the thermal decomposition reaction of explosive,and numerical simulations were conducted to investigate the thermal decomposition process of JEO explosive under different heating rates using Fluent software.The results indicate that the thermal decomposition reaction of JEO explosive proceeds slowly before phase tran-sition,while it accelerates significantly afterwards,leading to a rapid increase in temperature and an exponential growth in pressure until ignition.The ignition temperature of JEO explosive is approximately 220℃,and its response level is deflagration under the constraint conditions of this experiment,demonstrating excellent thermal safety.As the heating rate decreases,the ignition time of JEO explosive prolongs,and the ignition location shifts from the edge of the charge towards the center,resulting in an increased intensity of the reaction.During the thermal decomposition process before ignition,only a small portion of the explosive undergoes reaction,with the majority of the reaction occurring during the combustion stage after ignition.

关 键 词：JEO炸药 烤燃实验 热响应特性 升温速率 数值模拟 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O389[理学—流体力学]