Analysis of the Heat Transfer Characteristics of DNAN-based Melt-cast Explosive in Slow Cook-off Test

doi:10.3969/j.issn.1000-1093.2019.06.005

Abstract

Abstract: 3 experimental devices were designed to investigate the internal heat transfer characteristics of 2,4-dinitroanisole(DNAN)-based melt-cast explosive in slow cook-off test, and tested by scaled thermal explosion experiment. The temperature curves of internal monitoring points in the explosive under a thermal stimulus with the rate of 1 K/min were obtained. It is found that the phase-transition temperature is 73 ℃, the ignition temperature is 205 ℃, and the incomplete combustion reaction occurs after ignition. The ignition location is estimated to be on the upper half of bomb body. The changing process of internal temperature of DNAN-based melt-cast explosive is described. The internal temperature field was analyzed by numerical simulation, and the whole process of phase transition was observed. The results show that the internal temperature field of explosive in solid phase is elliptical, and its internal temperature field in liquid phase is layered. A natural convection arises inside the explosive after phase transition, which is a major factor to affect the ignition location distribution of the explosive. Key

Key words: 2,4-dinitroanisole, melt-castexplosive, cook-off, phasetransition, naturalconvection, heattransfercharacteristic

CLC Number:

TQ564.3

ZHOU Jie， ZHI Xiaoqi， LIU Zide， WANG Xue， WANG Shuai. Analysis of the Heat Transfer Characteristics of DNAN-based Melt-cast Explosive in Slow Cook-off Test[J]. Acta Armamentarii, 2019, 40(6): 1154-1160.

References

［1］王昕. 美国不敏感混合炸药的发展现状［J］. 火炸药学报, 2007, 30(2):78-80.
WANG X. Current situation of study on insensitive composite explosives in USA［J］. Chinese Journal of Explosives & Propellants, 2007, 30(2):78-80. (in Chinese)
［2］ FEDOROFF B T. Encyclopedia of explosives and related items: vol.3 ［M］. Dover, NJ, US: Picatinny Arsenal, 1960.
［3］ SCOTT F. Melt pourloading of PAX-21 into the 60 mm M720E1 mortar cartridge ［C］∥Proceedings of Insensitive Munitions and Energetic Materials Technology Symposium.Arlington, MA, US: NDIA， 2000: 91-99.
［4］高杰, 焦建设, 王浩, 等. DNAN基熔铸复合炸药的爆轰性能［J］. 火炸药学报, 2014, 30(3):26-28.
GAO J,JIAO J S,WANG H,et al. Detonation properties of DNAN-based melt-cast composition explosive［J］. Chinese Journal of Explosives and Propellants, 2014, 30(3):26-28. (in Chinese)
［5］王春光, 魏敏, 刘学柱, 等. DNAN基高威力钝感熔铸炸药装药工艺应用［J］. 兵工自动化,2013,32(1):42-47.
WANG C G,WEI M,LIU X Z,et al. Charging technology application of high power insensitive melt-pour explosive based on DNAN［J］. Ordnance Industry Automation, 2013,32(1):42-47. (in Chinese)
［6］罗一鸣, 蒋秋黎, 赵凯, 等. 2，4-二硝基苯甲醚与TNT凝固行为的差异性分析［J］. 火炸药学报, 2015,38(5):37-40.
LUO Y M, JIANG Q L, ZHAO K, et al. Analysis on differences of solidfication behavior of DNAN and TNT［J］. Chinese Journal of Explosives and Propellants, 2015,38(5):37-40. (in Chinese)
［7］蒙君煚, 张向荣, 周霖. DNAN基熔铸炸药成型过程数值仿真［J］.兵工学报, 2013,34(7):810-814.
MENG J J, ZHANG X R, ZHOU L. Simulation of solidification process for DNAN-based melt-cast explosives［J］. Acta Armamentarii, 2013,34(7):810-814. (in Chinese)
［8］王红星, 王晓峰, 罗一鸣, 等. DNAN炸药的烤燃试验［J］.含能材料, 2009,17(2):183-186.
WANG H X,WANG X F,LUO Y M,et al.Cook-off test of DNAN explosive［J］. Chinese Journal of Energetic Materials, 2009,17(2): 183-186. (in Chinese)
［9］陈朗, 李贝贝, 马欣. DNAN炸药烤燃特征［J］. 含能材料, 2016,24(1):27-32.
CHEN L,LI B B,MA X. Research on the cook-off characteristics of DNAN explosive［J］. Chinese Journal of Energetic Materials, 2016,24(1):27-32. (in Chinese)

［10］陈朗, 王沛, 冯长根.考虑相变的炸药烤燃数值模拟计算［J］.含能材料, 2009,17(5):568-573.
CHEN L,WANG P,FENG C G. Numerical simulation of cook-off about phase transition of explosive［J］. Chinese Journal of Energetic Materials, 2009,17(5):568-573. (in Chinese)
［11］ MCCLELLAND M A, GLASCOE E A, NICHOLS A L, et al. ALE3D simulation of incompressible flow, heat transfer, and chemical decomposition of Comp B in slow cookoff experiments［C］∥Proceedings of International Detonation Symposium. San Francisco,CA, US: Lawrence Livermore National Laboratory,2014:1-13.
［12］张宁, 李光正. 特殊条件下矩形封闭空腔内自然对流数值研究［J］. 华中科技大学学报,2002,30(7):95-97.
ZHANG N,LI G Z. Natural convection in rectangular enclosures heated from one side and cooled from ceiling［J］. Journal of Huazhong University of Science and Technology, 2002,30(7):95-97. (in Chinese)
［13］宋姗姗,郭雪岩. Boussinesq近似与封闭腔体内自然对流的数值模拟［J］.力学季刊,2012,33(1):60-67.
SONG S S,GUO X Y. Boussinesq approximation and numerical simulation of nature convection in a closed square cavity［J］.Chinese Quarterly of Mechanics, 2012,33(1):60-67.(in Chinese)
［14］王福军. 计算流体动力学［M］. 北京:清华大学出版社，2004.
WANG F J. Analysis of computational fluid dynamics［M］. Beijing: Tsinghua University Press， 2004.(in Chinese)
［15］许越. 化学反应动力学［M］. 北京:化学工业出版社，2004.
XU Y. Chemical reaction kinetics［M］. Beijing: Chemical Industry Press,2004. (in Chinese)
［16］王洪伟, 智小琦, 郝春杰, 等. 升温速率对限定条件下烤燃弹热起爆临界温度的影响［J］. 含材料料,2016,24(4):380- 384.
WANG H W,ZHI X Q,HAO C J, et al. Effect of heating rate on the critical temperature of thermal initiation of cook-off bomb in defined conditions［J］. Chinese Journal of Energetic Materials, 2016,24(4):380-384. (in Chinese)

第40卷第6期
2019 年6月兵工学报ACTA
ARMAMENTARIIVol.40No.6Jun.2019

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