不同射击工况下膛内模块装药的热安全性预测  

Thermal Safety Prediction of Modular Charge in the Chamber under Different Firing Conditions

作　　者：钱环宇 余永刚[1] 刘静 QIAN Huan-yu;YU Yong-gang;LIU Jing(School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;Academy of Opto-electronic, 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：《火炸药学报》2020年第2期230-236,共7页Chinese Journal of Explosives & Propellants

基　　金：国家自然科学基金(No.51176076)。

摘　　要：为研究火炮多发连续射击情况下模块装药滞留膛内的热安全性问题,建立了膛内模块装药二维非稳态烤燃模型,采用FLUENT软件对模块装药在膛内的烤燃过程进行了数值模拟,分析了3种射击工况下多发连续射击后继续装填模块装药留膛时的烤燃特性。结果表明,常温下不同射击工况对膛内模块装药的烤燃响应时间影响较大,对烤燃起始响应位置影响较小,对烤燃响应温度几乎无影响;采用5发/min射速射击32发后模块装药的烤燃响应时间为399.2s,采用1发/min射速射击43发和采用混合射速射击41发后模块装药的烤燃响应时间分别为176.4s和179.6s。3种射击工况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,单基药的烤燃响应温度分别为459.2、462.7和460.0K。To study the thermal safety of modular charge in the artillery chamber after continuous fire rounds,a 2D unsteady state cook-off model of modular charge in the chamber was established.The cook-off process of modular charge in the chamber was numerically simulated by FLUENT software,and the cook-off response characteristics of modular charge reloaded in the chamber after three continuous firing conditions was analyzed.The results show that firing conditions have much influence on the cook-off response time of modular charge,while it has little influence on the initial cook-off response position and cook-off response temperature.The cook-off response time of modular charge is 399.2s under the condition of firing 32 rounds at 5 rounds/min,while response times are 176.4s and 179.6s under conditions of firing 43 rounds at 1 round/min and firing 42 rounds at a mixed firing speed.The initial ignition position is near the right end of the cartridge,where the single-base propellant is ignited first and an annular firing response zone is formed for all three conditions.The ignition response temperatures of single-base propellant are 459.2,462.7and 460.0 K,respectively.

关 键 词：物理化学 发射药 模块装药 热安全性 射击工况 烤燃特性 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O64[理学—物理化学]