欢迎访问《兵工学报》官方网站,今天是

兵工学报 ›› 2025, Vol. 46 ›› Issue (6): 240565-.doi: 10.12382/bgxb.2024.0565

• • 上一篇    下一篇

典型DNAN基熔铸炸药燃速特性

李治, 段卓平, 白志玲*(), 许礼吉, 张连生, 黄风雷   

  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
  • 收稿日期:2024-07-10 上线日期:2025-06-28
  • 通讯作者:
  • 基金资助:
    国家自然科学基金项目(12002044)

Burning Rate Characteristics of Typical DNAN-based Melt-cast Explosives

LI Zhi, DUAN Zhuoping, BAI Zhiling*(), XU Liji, ZHANG Liansheng, HUANG Fenglei   

  1. State Key Laboratory of Explosion Science and Safety Protection, Beijing Institute of Technology, Beijing 100081, China
  • Received:2024-07-10 Online:2025-06-28

摘要:

约束装药点火后反应演化模型是安全弹药缓释结构设计的理论依据,而炸药燃速-压力关系是反应演化模型的重要组成部分。为了给2,4-二硝基苯甲醚(2,4-Dinitroanisole,DNAN)基熔铸炸药的安全弹药反应烈度控制设计提供基础,基于激光点火技术和快响应热电偶火焰阵面探测技术,建立密闭空腔线性燃烧燃速-压力特性实验测量系统,得到典型DNAN基熔铸炸药RB-2(DNAN/奥克托今/Al/黏结剂)的燃速-压力特性,研究温度对炸药燃速-压力关系的影响。研究结果表明:随着温度的升高,RB-2炸药燃速增大,压力指数增加,同时压力越高、温度对燃速的影响越显著;RB-2炸药在60MPa压力下会发生固体结构失效,导致燃速剧增,使炸药由线性传导燃烧机制向对流燃烧机制转变;与熔铸B炸药相比,RB-2炸药的燃速和压力指数较低,结构失效压力较高,意外点火后的反应增长慢,更容易通过反应缓释结构调控反应烈度。

关键词: DNAN基熔铸炸药, 燃烧速率, 初始温度, 比表面积

Abstract:

The reaction evolution model of constrained charge after ignition is the theoretical basis for the design of safe munition release mechanism,and the explosive burning rate-pressure relationship is an important part of the reaction evolution model. To provide a foundation for the design of safety munition reaction violence control for 2,4-dinitroanisole (DNAN)-based melt-cast explosives,an experimental measurement system for closed bomb burning rate-pressure characteristics is established based on the laser ignition technology and the fast-response thermocouple flame front detection technology. The burning rate-pressure relationship of a typical DNAN-based melt-cast explosive RB-2(DNAN/HMX/Al/binder) was obtained through experiment,and the effect of temperature on the burning rate-pressure characteristics of the explosive was investigated. The results show that the burning rate of RB-2 explosives increases and the pressure index increases with the increase in temperature. At the same time,the higher the pressure is,the more significant the effect of temperature on the burning rate is. When RB-2 explosive is subjected to a pressure of 60MPa,its solid structure will fail to result in a rapid increase in the burning rate and shift the combustion mechanism of explosive from the linear conduction combustion to the convective combustion. Compared to melt-cast B explosives,RB-2 explosives exhibit lower burning rates and pressure index,along with higher structural failure pressures of the explosives. The reaction growth after accidental ignition is slower,and the reaction violence is regulated more easily through the reaction release structure.

Key words: DNAN-based melt-cast explosive, burning rate, initial temperature, specific surface area

中图分类号: