2,4-二硝基苯甲醚基熔铸炸药的烤燃机理分析  

Analysis of thermal response characteristics of 2,4-dinitroanisole melt-cast explosive

作　　者：段继 智小琦[1] DUAN Ji;ZHI Xiaoqi(School of Mechanical and Electrical Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学机电工程学院,太原030051

出　　处：《兵器装备工程学报》2023年第8期13-18,共6页Journal of Ordnance Equipment Engineering

基　　金：山西省基础研究计划资助项目(20210302124340)。

摘　　要：为探究DNAN基熔铸炸药的烤燃机理,设计了1℃/min的慢速烤燃试验,测试了3种尺寸烤燃试件的内部温度和响应.分析测试结果,随着尺寸的增加,炸药的响应温度逐渐降低,分别为196.7、184.6、180.9℃,响应后表现为燃烧反应.为科学分析悬浮态体系流动对烤燃机理的影响,开发了耦合RDX溶解度、炸药表观粘度和多步反应动力学的多组分混合网格计算方法,计算与试验结果的误差小于5%.分析温度场发现,炸药在上端形成高温区,伴随高温区的形成流动趋势发生转变;临近点火,高温区逐渐向中心扩散移动,Φ19 mm×19 mm和Φ19 mm×38 mm试件为中心点火,Φ19 mm×76 mm为两端不对称点火.In order to investigate thermal response characteristics of DNAN-based melt-cast explosive,this paper designs slow cook-off experiments at a heating rate of 1°C/min,and tests the internal temperature and response of three sizes of roast specimens.The results show that,with the increase of the size,the response temperatures of the explosive decrease gradually,which are 196.7℃,184.6℃and 180.9℃respectively.The reaction after the response is the combustion.In order to scientifically analyze the influence of the flow of a suspended system on the roasting mechanism,a multi-component hybrid grid calculation method is coupled with the RDX solubility,explosive apparent viscosity and multi-step reaction kinetics.The error between the calculation and the experimental results is less than 5%.The analysis of the temperature field shows that the explosive forms a high-temperature zone at the upper end,and the flow trend changes with the formation of the high-temperature zone.Near the ignition time,the high-temperature zone gradually diffuses and moves to the center.The ignition positions of Φ19 mm × 19 mm andΦ19 mm×38 mm are the center.For sizeΦ19 mm×76 mm,the ignition is asymmetric at upper and lowerends.

关 键 词：2 4-二硝基苯甲醚 溶解度 表观粘度 多步反应 传热特性 

分 类 号：O381[理学—流体力学] TJ55[理学—力学]