高压下PBX-1炸药的燃速-压力特性

姚奎光 赵学峰 樊星 薛鹏伊 代晓淦

姚奎光, 赵学峰, 樊星, 薛鹏伊, 代晓淦. 高压下PBX-1炸药的燃速-压力特性[J]. 爆炸与冲击, 2020, 40(1): 011404. doi: 10.11883/bzycj-2019-0347
引用本文: 姚奎光, 赵学峰, 樊星, 薛鹏伊, 代晓淦. 高压下PBX-1炸药的燃速-压力特性[J]. 爆炸与冲击, 2020, 40(1): 011404. doi: 10.11883/bzycj-2019-0347
YAO Kuiguang, ZHAO Xuefeng, FAN Xing, XUE Pengyi, DAI Xiaogan. Burn rate-pressure characteristic for PBX-1 explosive at high pressures[J]. Explosion And Shock Waves, 2020, 40(1): 011404. doi: 10.11883/bzycj-2019-0347
Citation: YAO Kuiguang, ZHAO Xuefeng, FAN Xing, XUE Pengyi, DAI Xiaogan. Burn rate-pressure characteristic for PBX-1 explosive at high pressures[J]. Explosion And Shock Waves, 2020, 40(1): 011404. doi: 10.11883/bzycj-2019-0347

高压下PBX-1炸药的燃速-压力特性

doi: 10.11883/bzycj-2019-0347
基金项目: 国家自然科学基金(11702266)
详细信息
    作者简介:

    姚奎光(1987- ),男,硕士,助理研究员,yaokg@caep.cn

    通讯作者:

    代晓淦(1978- ),男,博士,副研究员,zhangy2005767@sina.com

  • 中图分类号: O389

Burn rate-pressure characteristic for PBX-1 explosive at high pressures

  • 摘要: 炸药燃速-压力特性是弹药安全性的关键内因,反映了炸药反应烈度增长的倾向性。为了认识PBX-1炸药在未损伤状态下的燃烧特性,发展了密闭空腔燃烧压力-炸药耗量法以及炸药燃烧速率测试方法,并对PBX-1炸药开展了燃烧实验。采用压力传感器测量了密闭燃烧器内部的压力历程,采用快速响应热电偶监测了炸药燃烧阵面时间-位置数据,获得了炸药燃烧速率并拟合出常温下PBX-1炸药热传导燃烧速率与压力的依赖关系r=(2.16±0.55)p1.08±0.06。结果表明,PBX-1炸药的压力指数大于1,燃烧速率对压力变化比较敏感,在100 MPa压力范围内燃烧速率呈指数关系,当压力超过100 MPa后燃烧变得不稳定,燃烧速率迅速增加,导致燃烧器内压力骤变。分析其主要原因是,高压下PBX-1炸药发生物理破坏,炸药燃烧比表面积增加100多倍,炸药反应烈度有经对流燃烧机制提升的趋势。
  • 图  1  实验系统示意图

    Figure  1.  Illustration of experimental system

    图  2  密闭燃烧器结构示意图

    Figure  2.  Schematic diagram of the structure of closed bomb

    图  3  实验样品照片

    Figure  3.  Picture of sample

    图  4  不同压力下燃烧火焰阵面位置-时间数据曲线

    Figure  4.  Flame-front time-of-arrival signals at different pressure

    图  5  几种HMX含量为95%的PBX炸药的燃速-压力特性

    Figure  5.  Burn rate-pressure characteristic for several 95%HMX-based PBXs

    图  6  PBX-1炸药燃烧速率随压力变化曲线

    Figure  6.  Burn rate data for PBX-1 at different pressure

    图  7  PBX-1炸药燃烧比表面积变化情况

    Figure  7.  Normalized burning surface area of PBX-1 at different pressures

    表  1  常温下PBX-1炸药燃烧时间和燃烧速率数据

    Table  1.   Burn time and rate of PBX-1 at ambient temperature

    炸药柱序号234567
    燃烧时间/s0.254 180.102 690.045 900.028 210.018 450.000 52
    平均燃速/(mm·s−1)31.47477.904174.192283.587433.60415 384.600
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出版历程
  • 收稿日期:  2019-09-06
  • 修回日期:  2019-11-19
  • 刊出日期:  2020-01-01

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