内/外隔热复合结构炸药装药快速烤燃热防护效应  

Fast Cook-off Thermal Protection Effects of Inner and Outer Heat-insulating Composite Structures of Explosive Charge

作　　者：白孟璟 段卓平[1] 白志玲 张玉龙 刘瑞峰 张连生[1] 黄风雷[1] BAI Mengjing;DUAN Zhuoping;BAI Zhiling;ZHANG Yulong;LIU Ruifeng;ZHANG Liansheng;HUANG Fenglei(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China;China North Advanced Technology Generalization Institute,Beijing 100089,China;Xi an Institute of Electromechanical Information Technology,Xi an 710065,Shaanxi,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 [2]中国兵器工业新技术推广研究所,北京100089 [3]西安机电信息技术研究所,陕西西安710065

出　　处：《兵工学报》2024年第5期1555-1563,共9页Acta Armamentarii

基　　金：国家自然科学基金青年项目(12002044)。

摘　　要：为了研究快速烤燃(火烧)条件下炸药装药内/外隔热复合结构(内隔热材料/外阻燃材料)的热防护效应,对多种内/外隔热复合结构的炸药装药进行多点测温快速烤燃试验,得到火焰场和炸药装药各测点的温度-时间曲线及装药点火响应时间。开展内/外隔热复合结构炸药装药快速烤燃数值模拟,获得内/外隔热复合结构对装药快速烤燃点火响应时间的影响规律。研究结果表明:在快速烤燃过程中,外阻燃材料由于火烧变性存在导热增强及隔热减弱效应,在数值模拟中需考虑该效应;无论使用单独的隔热/阻燃材料还是使用内/外隔热复合结构,炸药装药的点火响应时间均随着材料涂覆厚度增加而延后,其中内/外隔热复合结构具有更好的热防护能力;点火位置均发生在装药端面棱角处,装药点火后反应烈度不受内/外隔热复合结构影响,反应等级均为爆燃;对于一定热防护性能范围内的隔热阻燃材料,壳体外表面涂层材料是耐高温纳米隔热材料、壳体内表面涂层材料是高效隔热防护材料时复合结构的隔热效果最好,并且当需求的隔热效果给定时,可考虑优先增加壳体外表面涂层的涂覆厚度,实现以最小涂覆厚度的内/外隔热复合结构满足所需的隔热效果。研究成果可为提升弹药热安全性设计提供参考。In order to study the thermal protection effects of the inner and outer heat-insulating composite structures(inner heat-insulating material/outer combustion-insulating material)of explosive charges under the condition of fast cook-off(burning),the multi-point temperature measurement fast cook-off experiments are carried out on explosive charges with various forms of inner and outer heat-insulating composite structures.The temperature-time curves of flame and each measuring point of explosive charge and the ignition response time of the charge are obtained.The fast cook-off ignition of explosive charges with different inner and outer heat-insulating composite structures is numerically simulated to obtain the influence law of inner and outer heat-insulating composite structures on the ignition response time of charge under fast cook-off.The results show that the thermal conductivity of the outer combustion-insulating material is increased and its thermal insulation is weakened due to the burning and denaturation of the material during the process of fast cook-off experiment.This effect should be considered in numerical simulation.The ignition response time of explosive charge is delayed with the increase in the coating thickness of both heat-insulating and combustion-insulating materials,whether using separate insulating/combustion-insulating materials or inner and outer heat-insulating composite structures.The inner and outer heat-insulating composite structures have better thermal protection ability and can significantly delay the ignition response time of the charge.The ignition position all occurs at the corner of the end face of the charge,and the reaction intensity after ignition is not affected by the inner and outer heat-insulating composite structures and is always the deflagration.For insulating/combustion-insulating materials within a certainprotection performance range,the composite structure has the best heat-insulating effect when the coating material on the outer surface of the shell is HGN and the c

关 键 词：炸药装药 快速烤燃 内/外隔热复合结构 热防护效应 点火延迟 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]