The Influence of Ambient Temperature after Gun Firing on Thermal Safety of Modular Charge in the Chamber

doi:10.3969/j.issn.1000-1093.2020.02.006

Abstract

Abstract: To analyze the thermal safety of modular charge retaining in the chamber after continuous firing of gun until the temperature in inner chamber reaches the possible temperature value of cook-off response, a 2D unsteady state cook-off model of the modular charge is established. Cook-off process of the combustible module filled with single-base propellant is simulated by Fluent. Cook-off characteristics of modular charge during retaining in the chamber after a number of rounds were fired at 1 round/min under different ambient temperatures of 50 ℃,20 ℃,0 ℃,-20 ℃ and -40 ℃ were analyzed numerically. Results show that the lower the ambient temperature during firing is, the longer the cook-off response time of modular charge is. The cook-off response times are 136.0 s,176.4 s,205.7 s,237.4 s and 278.5 s, respectively, under five ambient temperatures. The initial ignition position is near the right end inner surface of module box, where the single-base propellant ignites first and forms an annular firing response zone under all ambient temperatures. The ignition response temperatures of single-base propellant are 454.2-462.6 K under different firing conditions. Key

Key words: gun, modularcharge, thermalsafety, ambienttemperature, cook-offresponsecharacteristic

CLC Number:

QIAN Huanyu， YU Yonggang， LIU Jing. The Influence of Ambient Temperature after Gun Firing on Thermal Safety of Modular Charge in the Chamber[J]. Acta Armamentarii, 2020, 41(2): 254-261.

References

［1］邓海, 沈飞, 梁争峰, 等. 不同约束条件下B炸药的慢烤响应特性［J］. 火炸药学报, 2018, 41(5):49-54.
DENG H, SHEN F, LIANG Z F, et al. Slow cook-off response characteristics of composition B under different constraints［J］. Chinese Journal of Explosives & Propellants, 2018, 41(5):49-54. (in Chinese)
［2］许丽娟, 曹雄, 冯翼鲲, 等. 含能材料CL-20的热安全性测试分析［J］. 安全与环境学报, 2018, 18(1):74-78.
XU L J, CAO X, FENG Y K, et al. Test and analysis for the thermal safety of the energetic material known as CL-20［J］. Journal of Safety and Environment, 2018, 18(1):74-78. (in Chinese)
［3］李萍, 敖登高娃, 李纯志, 等. 龙骨状纳米结构TATB的构筑与热分解动力学研究［J］. 含能材料, 2019,27(2):137-143.
LI P, AODENG G W, LI C Z, et al. Construction and thermal decomposition kinetics of the keel-like nanostructure TATB［J］. Chinese Journal of Energetic Materials, 2019,27(2):137-143. (in Chinese)
［4］ OWUSU D, KIM S H, CHAE J, et al. CFD cook-off simulation and thermal decomposition of confined high energetic material［J］. Propellants, Explosives, Pyrotechnics, 2015, 40(5):699-705.
［5］ AYDEMIR E, ULAS A, SERIN N. Thermal decomposition and ignition of PBXN-110 plastic-bonded explosive［J］. Propellants, Explosives, Pyrotechnics, 2012,37(3):308-315.
［6］秦沛文, 赵孝彬, 李军, 等. NEPE推进剂热安全性的尺寸效应［J］. 火炸药学报, 2016, 39(1): 84-88,94.
QIN P W, ZHAO X B, LI J, et al. Size effects of thermal safety of NEPE propellant［J］. Chinese Journal of Explosives & Propellants, 2016, 39(1): 84-88,94. (in Chinese)
［7］ YANG H W, YU Y G, YE R, et al. Cook-off test and numerical simulation of AP/HTPB composite solid propellant［J］. Journal of Loss Prevention in the Process Industries, 2015, 40:1-9.
［8］ LI W F, YU Y G, YE R. Effects of charge size on slow cook-off characteristics of AP/HTPB composite propellant in base bleed unit［J］. Propellants, Explosives, Pyrotechnics, 2018, 43(4):404-412.
［9］张林军, 杜姣姣, 栾洁玉, 等. 热老化对RDX基含铝压装炸药装药发射安全性的影响［J］. 含能材料, 2018, 26(2): 156-160.
ZHANG L J, DU J J, LUAN J Y, et al. Effect of thermal-aging on launching safety of RDX-based aluminized and pressed explosive charge［J］. Chinese Journal of Energetic Materials, 2018, 26(2): 156-160. (in Chinese)

［10］王凯, 王俊林, 徐东, 等. 3-硝基-1,2,4-三唑-5-酮自催化分解反应特性与热安全性研究［J］. 兵工学报, 2018, 39(9): 1727-1732.
WANG K, WANG J L, XU D, et al. Research on autocatalytic thermal decomposition properties and thermal safety of NTO［J］. Acta Armamentarii, 2018, 39(9): 1727-1732. (in Chinese)
［11］刘静, 余永刚. 模块装药快速烤燃特性的数值预测［J］. 含能材料, 2019, 27(5):25-30.
LIU J, YU Y G. Numerical prediction of fast cook-off characteristic for modular charges［J］. Chinese Journal of Energetic Materials, 2019, 27(5):25-30. (in Chinese)
［12］刘伟, 范爱武, 黄晓明. 多孔介质传热传质理论与应用［M］. 北京：科学出版社, 2006.
LIU W, FAN A W, HUANG X M. Theory and application of heat and mass transfer in porous media［M］. Beijing：Science Press, 2006. (in Chinese)
［13］陈桂东, 周彦煌. 火炮身管报警温度的确定［J］. 兵工学报, 2008, 29(1):19-22.
CHEN G D, ZHOU Y H. Methods to ascertain the alert temperature of gun tube［J］. Acta Armamentarii, 2008, 29(1):19-22. (in Chinese)
［14］胡祖荣, 郭鹏江, 宋纪蓉, 等. 用非等温DSC估算硝化棉热爆炸的临界温升速率［J］.火炸药学报, 2003, 26(2):53-57.

HU Z R, GUO P J, SONG J R, et al. estimation of the critical increase temperature rate of thermal explosion of nitrocellulose using non-isothermal DSC［J］. Chinese Journal of Explosives & Propellants, 2003, 26(2):53-57. (in Chinese)
［15］姚二岗, 胡荣祖, 赵凤起, 等. 用DSC曲线数据估算硝化棉的CnB和表观经验级数自催化分解反应热爆炸临界温升速率［J］. 火炸药学报, 2013, 36(5):72-76.
YAO E G, HU R Z, ZHAO F Q, et al. Estimation of the critical rate of temperature rise for thermal explosion of CnB and apparent empiric-order autocatalytic decomposing reaction of nitrocellulose from DSC curves［J］. Chinese Journal of Explosives & Propellants, 2013, 36(5): 72-76. (in Chinese)
［16］宁斌科, 刘蓉. 硝化棉一级自催化分解反应动力学参数数值模拟［J］. 含能材料, 1999, 7(4):162-165.
NING B K, LIU R. Numerical simulation of kinetic parameters of the first-order autocatalytic decomposition of NC［J］. Chinese Journal of Energetic Materials, 1999, 7(4):162-165. (in Chinese)
［17］刘子如. 含能材料热分析［M］. 北京：国防工业出版社，2008.
LIU Z R. Thermal analyses for energetic materials［M］. Beijing：National Defense Industry Press,2008. (in Chinese)

第41卷
第2期2020 年2月兵工学报ACTA
ARMAMENTARIIVol.41No.2Feb.2020

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