欢迎访问《兵工学报》官方网站,今天是

兵工学报 ›› 2019, Vol. 40 ›› Issue (1): 99-106.doi: 10.3969/j.issn.1000-1093.2019.01.012

• 论文 • 上一篇    下一篇

炸药裂缝中的对流燃烧现象实验研究

尚海林, 杨洁, 胡秋实, 李涛, 傅华, 胡海波   

  1. (中国工程物理研究院 流体物理研究所 冲击波物理与爆轰物理重点实验室, 四川 绵阳 621999)
  • 收稿日期:2018-01-30 修回日期:2018-01-30 上线日期:2019-03-12
  • 作者简介:尚海林(1983—), 男, 助理研究员。E-mail: hailinshang@caep.cn
  • 基金资助:
    国家自然科学基金项目(11702273);中国工程物理研究院流体物理研究所领域规划项目(LYGH201402)

Experimental Research on Convective Burning in Explosive Cracks

SHANG Hailin, YANG Jie, HU Qiushi, LI Tao, FU Hua, HU Haibo   

  1. (National Key laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China)
  • Received:2018-01-30 Revised:2018-01-30 Online:2019-03-12

摘要: 为研究高能炸药裂缝中燃烧演化规律,加深对武器装药意外点火后发生高烈度反应复杂力学-热学-化学耦合过程的机理性认识,采用热点火方式结合高速摄影、压力测量等测试技术,对奥克托今基JO-9159粘结炸药预置裂缝中燃烧演化过程开展实验观测。结合气动壅塞理论分析了裂缝宽度对燃烧演化的影响。结果表明:在较强约束条件下,炸药内部亚毫米宽度的裂缝燃烧能够产生超过200 MPa的压力,火焰传播速度超过600 m/s;裂缝宽度越大,装置解体前燃烧产生的峰值压力越低,对流燃烧传播速度越快。

关键词: 炸药, 裂缝, 传导燃烧, 对流燃烧

Abstract: To investigate the evolution law of burning in high explosive cracks and understand the mechanism of the complicated mechanical-heat-chemical coupling process for high intensity reaction of projectile fillings during accidental ignition, the evolutionary process of burning in preformed cracks inside HMX-based PBX under non-shock initiation was recorded by high-speed camera and pressure transducers. The influences of different crack widths on burning evolution are analyzed based on gas-dynamic choking theory. Experimental results reveal that, under relatively high constraint conditions, the convective burning in sub-millimeter cracks of explosive can produce high pressure exceeding 200 MPa, and the flame propagation speed exceeds 600 m/s. The comparison of different crack widths indicates that the pressure due to convective burning decreases with the increase in crack width, but the burning propagation speed increases. Key

Key words: explosive, crack, conductiveburning, convectiveburning

中图分类号: