缓慢热作用下PBX-9炸药的响应特性  

Response Characteristics of PBX-9 Explosive under Slow Thermal Stimulus

作　　者：姚奎光 钟敏[1] 代晓淦[1] 吕子剑[1] 

机构地区：[1]中国工程物理研究院化工材料研究所,四川绵阳621900

出　　处：《火炸药学报》2015年第6期56-60,共5页Chinese Journal of Explosives & Propellants

基　　金：国防基础科研项目(CB1520132004)

摘　　要：为研究RDX 基PBX-9炸药的热响应规律,分别采用1.5、3.0、4.5、8.0℃/min的升温速率对PBX-9炸药药柱进行了烤燃试验.用热电偶测试了药柱表面的温度变化,通过测量冲击波超压和收集试验弹残骸,分析了药柱的反应程度,获得了不同升温速率下的响应规律.结果表明,升温速率为1.5～8.0℃/min时,对PBX-9炸药的响应温度没有明显的影响,试验弹响应时药柱温度约为140～150℃,均为燃烧反应.烤燃过程中黏结剂的分解对PBX-9炸药响应特性影响较大,使其反应程度一致.采用FLUENT 软件对该烤燃试验过程进行了数值模拟,得到PBX-9炸药反应的活化能和指前因子分别为184.2×10^3J/mol和7.24×10^18s^-1.To study the thermal response rule of RDX-based polymer bonded explosive(PBX-9),the cook-off tests of PBX-9explosive at heating rates of 1.5,3.0,4.5,8.0℃/min were carried out.Temperature changing process of the surface of PBX-9explosive was measured by thermocouples.The reaction degree of the sample was analyzed and the response rules of PBX-9explosive at different heating rates were obtained by measuring the shock wave overpressure and the collected test projectile.The results show that the heating rate from 1.5℃/min to 8.0℃/min has no obvious effect on the response temperature of PBX-9explosive,and the response temperature of grain of test bomb is about 140~150℃.The degree belongs to the combustion reaction.In the process of cook-off test,the decomposition of binder has great influence on the response behavior of PBX-9explosive and the reaction degree is accordant.The numerical simulation of cook-off test was conducted using FLUENT software.The kinetic parameters such as activation energy and pre-exponential factor for the reaction of PBX-9explosive obtained from the numerical simulation were 184.2×103J/mol and 7.24×1018s-1,respectively.

关 键 词：爆炸力学 PBX-9炸药 升温速率 烤燃试验 数值模拟 响应特性 

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]