Effect of Geometric Dimensions on Slow Cook-off Response Characteristics of DNAN-based Melt-casting Explosive

被引：0
作者：
Liu Z.-D. [1 ]
Zhi X.-Q. [1 ]
Wang S. [1 ]
Zhou J. [1 ]
Wang X. [1 ]
Fan X.-H. [2 ]
机构：
[1] National Defence Key Subject Laboratory of Underground Target Damage Technology, North University of China, Taiyuan
[2] Jinxi Industries Group Co.,LTD., Taiyuan
来源：
Huozhayao Xuebao/Chinese Journal of Explosives and Propellants | 2019年 / 42卷 / 01期
关键词：
DNAN-based melt-casting explosive; Geometric dimension; Heating rate; Physical chemistry; Response characteristics; Slow cook-off test;
D O I：
10.14077/j.issn.1007-7812.2019.01.010
中图分类号：
学科分类号：
摘要：
To study the effect of geometric dimensions on the thermal reaction law of DNAN-based melt-casting explosive, a slow cook-off test device was self-designed. The slow cook-off test of ammunition with four sizes of Φ19mm×19mm,Φ19mm×38mm,Φ19mm×76mm and Φ30mm×30mm was carried out under the two heating rates of 1℃/min and 3.3℃/h respectively by means of multi-point temperature measurement method. The calculation model of slow cook-off test of explosive was established. The response of cook-off bomb was calculated by Fluent software when the geometric dimensions increased in one-dimension and two-dimension way at a heating rate of 3.3℃/h. The results show that the geometric dimensions and heating rate affect the response characteristics of cook-off bomb together. For the same cook-off bomb, the heating response level at a heating rate of 3.3℃/h is more severe than that of at a heating rate of 1℃/min. At a heating rate of 3.3℃/h, the ignition position of the cook-off bomb is located in the geometric center, and with the increase of the geometric dimensions, the temperature of outer wall of cook-off bomb gradually decreases at the ignition time, the cook-off bomb exits the lowest ambient temperature of 174.74℃ when the ignition reaction occurs, and when the length-to-diameter ratio of grain is 4, the temperature of the outer wall at the ignition time decreases exponentially with the increase of grain diameter. © 2019, Editorial Board of Journal of Explosives & Propellants. All right reserved.
引用
收藏
页码：63 / 68
页数：5
相关论文
共 8 条
  • [1] Tringe J.W., Glascoe E.A., McClelland M.A., Et al., Pre-ignition confinement and deflagration violence in LX-10 and PBX 9501, Journal of Applied Physics, 116, 5, (2014)
  • [2] Niu Y.-L., Feng X.-J., Guo X., Et al., Size effect and numericalsimulation of cook-off test for GHL01 explosive, Chinese Journal of Explosives & Propellants(Huozhayao Xuebao), 37, 5, pp. 37-41, (2014)
  • [3] Chen L., Li B.-B., Ma X., Research on the cook-off characteristics of DNAN explosives, Chinese Journal of Energetic Materials, 24, 1, pp. 27-32, (2016)
  • [4] Zhi X.-Q., Hu S.-Q., Influences of charge densities on responses of explosives to slow cook-off, Explosives and Shock Waves, 33, 2, pp. 221-224, (2013)
  • [5] Gao F., Zhi X.-Q., Liu X.-Z., Effect of physical interface onslow cook-off charcteristics of explosives, Chinese Journal of Explosives & Propellants(Huozhayao Xuebao), 37, 6, pp. 53-57, (2014)
  • [6] Hu S.-Q., Xie C.-B., Zhi X.-Q., Effect of charge densityand restriction of shell on slow cook-off characteristicsof passive RDX, Chinese Journal of Explosives & Propellants(Huozhayao Xuebao), 34, 2, pp. 26-28, (2011)
  • [7] Niu G.-T., Jin D.-Y., Luo Y.-M., Technical characteristics of DNAN-based melt-casting explosives, Ordnance Industry Automation, 33, 7, pp. 86-88, (2014)
  • [8] Xing X.-L., Zhao F.-Q., Ma S.-N., Et al., Specific heat capacity, thermal behavior, and thermal hazard of 2, 4-dinitroanisloe, Propellants, Explosives, Pyrotechnics, 37, 2, pp. 179-182, (2012)
1