Mesoscale study on explosion-induced formation and thermochemical response of PTFE/Al granular jet

作     者：Yuan-feng Zheng Zhi-jian Zheng Guan-cheng Lu Hai-fu Wang Huan-guo Guo Yuan-feng Zheng;Zhi-jian Zheng;Guan-cheng Lu;Hai-fu Wang;Huan-guo Guo

作者机构：State Key Laboratory of Explosion Science and TechnologyBeijing Institute of TechnologyBeijing100081China 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2023年第23卷第5期

页      面：112-125页

核心收录：

学科分类：082604[工学-军事化学与烟火技术] 08[工学] 0826[工学-兵器科学与技术] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China (No. 12172052) the China Postdoctoral Science Foundation (No. 3020036722021) 

主　　题：Reactive materials Shaped charge Mesoscale simulation Formation Thermochemical response 

摘      要：The dynamic formation,shock-induced inhomogeneous temperature rise and corresponding chemical reaction behaviors of PTFE/Al reactive liner shaped charge jet(RLSCJ)are investigated by the combination of mesoscale simulation,reaction kinetics and chemical energy release test.A two-dimensional granular model is developed with the randomly normal distribution of aluminum particle sizes and the particle delivery ***,the granular model is employed to study the shock-induced thermal behavior during the formation and extension processes of RLSCJ,as well as the temperature history curves of aluminum *** simulation results visualize the motion and temperature responses of the RLSCJ at the grain level,and further indicate that the aluminum particles are more likely to gather in the last two-thirds of the jet along its *** analysis shows that the shock,collision,friction and deformation behaviors are all responsible for the steep temperature rise of the reactive *** addition,a shock-induced chemical reaction extent model of RLSCJ is built based on the combination of the Arrhenius model and the Avrami-Erofeev kinetic model,by which the chemical reaction growth behavior during the formation and extension stages is described *** model indicates the reaction extent highly corresponds to the aluminum particle temperature history at the formation and extension *** last,a manometry chamber and the corresponding energy release model are used together to study the macroscopic chemical energy release characteristics of RLSCJ,by which the reaction extent model is verified.