Effects ofmodulenumberand firing conditiononchargethermal safetyingunchamber  

作　　者：Huan-yu Qian Yong-gang Yu Jing Liu 

机构地区：[1]School of Energy and Power Engineering Nanjing University of Science and Technology Narjing 21094,China [2]Acudemny of Opto-Electroric,China Electronis Technology Group Corporation(AOE CETC),Tianjin,300308,China

出　　处：《Defence Technology（防务技术）》2022年第1期27-37,共11页Defence Technology

摘　　要：Thermal safety of modular charge which is fed into and retained in the chamber after gun fires consecutively is first investigated with cook-off method,A two-dimensional cook-off model of modular charge in gun chamber is established and the cook-off process of modular charge in gun chamber is numerically simulated.Then the effects of module number and firing condition on charge thermal safety are evaluated by researching the cook-off response characteristics of modules.The results show that under conditions of different module numbers the cook-off responses all occur on the module closest to the boundary of missile,and the single-base propellants located at the inner surface of cartridge ignite first.When the number of loaded module changes from 1 to 6,the cook-off response temperatures vary little,only in a small range of 478.1 K-482.4 K.The cook-off response times decrease logarithmically in the range of 211.25-166.7 s with the increasing length of residual air gap in gun chamber.The simulation results are well matched with the experimental data.Furthermore,different firing conditions have greatinfluence on the cook-off response time,minor influence on the initial response position and little in-fluence on the response temperature.Under the three conditions of consecutive 32 launches with 5 rounds/min,43 launches with 1 round/min,and 41 launches with different firing frequencies,the cook off response temperatures are 479.2 K,481.1 K and 479.9 K respectively and the response times are 709.25,211.2 s and 214.4 s respectively.The response position is near the middle area of the inner cartridge surface in the former condition and near the right area in the latter two conditions.

关 键 词：Thermal safety Modular charge Cook-off Firing condition 

分 类 号：TJ33[兵器科学与技术—火炮、自动武器与弹药工程]