火炮射击环境温度对膛内模块装药热安全性的影响分析  

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

作　　者：钱环宇 余永刚[1] 刘静 QIAN Huanyu;YU Yonggang;LIU Jing(School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China;Academy of Opto-Electronics,China Electronics Technology Group Corporation,Tianjin 300308,China)

机构地区：[1]南京理工大学能源与动力工程学院,江苏南京210094 [2]中国电子科技集团公司光电研究院,天津300308

出　　处：《兵工学报》2020年第2期254-261,共8页Acta Armamentarii

基　　金：国家自然科学基金项目(51176076)

摘　　要：为分析模块装药在火炮连发射击直至内膛温度达到可能发生烤燃响应的温度值后留膛热安全性,建立了火炮膛内模块装药二维非稳态烤燃模型。采用计算流体力学Fluent软件,对装填单基药的可燃模块进行了烤燃模拟。数值分析了50℃、20℃、0℃、-20℃和-40℃5种环境温度下,火炮以1发/min持续射击一定发数后装填入膛的模块装药在留膛期间的烤燃特性。结果表明:射击环境温度越低,连发射击后膛内模块装药的烤燃响应时间越长;5种温度对应的烤燃响应时间分别为136.0 s、176.4 s、205.7 s、237.4 s和278.5 s;每种射击环境温度下均是靠近模块盒右侧端面处的单基药最先着火,并形成环形烤燃响应区;不同射击环境温度下单基药的烤燃响应温度范围为454.2~462.6 K.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.

关 键 词：火炮 模块装药 热安全性 射击环境温度 烤燃响应特性 

分 类 号：TJ012.14[兵器科学与技术—兵器发射理论与技术] TJ55