Explosion characteristics of aluminum-based activated fuels containing fluorine

作     者：Jin-tao Xu Lei Huang Hai-peng Jiang Tian-jiao Zhang Feng-qi Zhao Jian-kan Zhang Wei Gao Jin-tao Xu;Lei Huang;Hai-peng Jiang;Tian-jiao Zhang;Feng-qi Zhao;Jian-kan Zhang;Wei Gao

作者机构：State Key Laboratory of Fine ChemicalsDepartment of Chemical Machinery and Safety EngineeringDalian University of TechnologyDalian116024China Beijing Institute of Aerospace Testing TechnologyBeijing100074China Science and Technology on Combustion and Explosion LaboratoryXi'an Modern Chemistry Research InstituteXi'an710065China 

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

年 卷 期：2023年第20卷第2期

页      面：34-43页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：financially supported by National Natural Science Foundation of China(No.51922025 and No.51874066) China Postdoctoral Science Foundation(No.2020M670759) the Fundamental Research Funds for the Central Universities(No.DUT20GJ201)。 

主　　题：Aluminum-based activated fuels Ignition sensitivity Flame propagation Explosion severity Explosion mechanism 

摘      要：Measuring the dust explosion characteristics of aluminum-based activated fuels was a prerequisite for developing effective prevention and control measures.In this paper,ignition sensitivity,flame propagation behaviors and explosion severity of aluminum/polytetrafluoroethylene(Al/PTFE)compositions including 2 PT(2.80 wt.%F),4 PT(7.18 wt.%F)and 8 PT(11.90 wt.%F)were studied.When the content of F increased from 2.80 wt.%to 11.90 wt.%,the minimum explosive concentration MEC decreased from380 g/m^(3)to 140 g/m^(3),due to the dual effects of increased internal active aluminum and enhanced reactivity.The average flame propagation velocities increased as the percentage of F increased.The maximum explosion pressure Pmof 500 g/m3aluminum-based activated fuels increased from 247 k Pa to299 kPa.Scanning electron microscopy demonstrated that with the increase of PTFE content,the reaction was more complete.On this basis,the explosion mechanism of aluminum-based activated fuels was revealed.