B/KNO3点火药装药的烤燃特性研究
Study on the Cook-off Characteristics of B/KNO3 Ignition Charge
伍俊英 1尚伊平 1郑富德 1杜皓杰 1姚雨乐 1李钧剑 1陈朗1
作者信息
- 1. 北京理工大学爆炸科学与安全防护全国重点实验室,北京 100081
- 折叠
摘要
为研究B/KNO3点火药的热安全性,建立多点测温烤燃实验装置,对不同升温速率、不同装药密度条件下的B/KNO3点火药装药进行多点测温烤燃实验,以获得点火药装药发生点火的准确时间与烤燃过程中不同监测点的温度历程.建立B/KNO3点火药装药烤燃实验的数值计算模型并进行了数值模拟,计算中考虑了点火药的自热分解反应与相变吸热.通过与实验结果的对比,标定B/KNO3点火药装药的热物性参数和反应动力学参数.研究结果表明:B/KNO3点火药的指前因子为7.763 ×1013 s-1,活化能为2.078 7 × 105 J/mol;在点火药装药的烤燃过程中,随着升温速率的减小,点火延期时间逐渐增加,点火区域逐渐向中心移动,点火环境温度逐渐降低;在装药密度变化不太大的情况下,点火药的点火特征差别不大.
Abstract
The cook-off test devices for multi-point temperature measuring are established to study the thermal safety of B/KNO3 ignition charge.The multi-point temperature measuring and cook-off tests of B/KNO3 ignition charge under the conditions of different heating rates and charge densities are made to obtain the accurate ignition time of ignition charge and the temperature curves of different monitoring points during the cook-off tests.A numerical calculation model of B/KNO3 ignition charge for the cook-off test is established.The self-thermal decomposition reaction and phase transition heat absorption of ignition charge are considered in the calculation model.Then,the model is used to simulate the cook-off process of B/KNO3 ignition charge under the conditions of different heating rates and charge densities.The thermal and kinetic parameters of B/KNO3 ignition charge are calibrated by comparing with the experimental results.The results show that the pre-exponential factor of B/KNO3 ignition charge is 7.763 × 1013 s-1,and its activation energy is 2.078 7 × 105 J/mol;with the decrease in the heating rate,the ignition delay time increases gradually,the ignition area moves to the center gradually,and the ignition ambient temperature decreases gradually.When the change in charge density is not significant,the ignition characteristics of ignition charge do not differ much.
关键词
B/KNO3点火药/烤燃实验/热安全性/点火特性Key words
B/KNO3 ignition charge/cook-off test/thermal safety/ignition characteristics引用本文复制引用
基金项目
爆炸科学与安全防护全国重点实验室开放基金项目(KFJJ20-04M)
出版年
2024
NETL
NSTL
万方数据