含能材料2024，Vol.32Issue(11)：1182-1193,12.DOI:10.11943/CJEM2024010
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
张烨 1王新宇 1徐文雨 1王在成 1姜春兰1
作者信息
- 1. 北京理工大学爆炸科学与技术国家重点实验室,北京 100081
- 折叠
摘要
Abstract
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 exper-iments of JEO explosive were conducted at two different heating rates of 5℃·min-1 and 2℃·min-1 to obtain the ignition time,ig-nition 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 pres-sure 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 in-creased 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Key words
JEO explosive/cook-off experiment/thermal response characteristic/heating rate/numerical simulation分类
军事科技引用本文复制引用
张烨,王新宇,徐文雨,王在成,姜春兰..升温速率对JEO炸药烤燃响应特性的影响[J].含能材料,2024,32(11):1182-1193,12.
