文献类型：期刊文献

英文题名：Flame characteristics of premixed H2-air mixtures explosion venting in a spherical container through a duct

作者：Cao, Weiguo[1];Li, Wenjuan[1];Zhang, Liang[2];Chen, Jianfa[2];Yu, Shuo[1,3];Zhou, Zhuanghong[1];Zhang, Yun[1];Shen, Xiaobo[4];Tan, Yingxin[1]

机构：[1]North Univ China, Sch Environm & Safety Engn, Taiyuan 030051, Shanxi, Peoples R China;[2]Shanghai Space Prop Technol Res Inst, Shanghai 201109, PR, Peoples R China;[3]Shenyang City Univ, Sch Intelligent Engn, Shenyang 110112, Liaoning, Peoples R China;[4]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, PR, Peoples R China

年份：2021

卷号：46

期号：52

起止页码：26693

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20212610562506);WOS:【SCI-EXPANDED(收录号:WOS:000674606000013)】；

基金：This work was greatly supported by the Natural Science Foundation of Shanxi Province, China (Nos. 201901D211228, and 201903D121028), the National Defense Key Laboratory Foundation of Science and Technology on Combustion and Explosive Laboratory, China (Nos. 6142603200509, and 6142603180408), and Shanghai Rising-Star Program, China (No. 21QC1400400).

语种：英文

外文关键词：Explosion venting with a duct; Jet flame characteristics; Secondary combustion; Coupling process; Explosion venting design

摘要：The explosion venting duct can effectively reduce the hazard degree of a gas explosion and conduct the venting energy to the safe area. To investigate the flame quantitative propagation law of explosion venting with a duct, the effects of hydrogen fraction and explosion venting duct length on jet flame propagation characteristics of premixed H-2-air mixtures were analyzed through experiment and simulation. The experiment results under initial conditions of room temperature and 1 atm show that when hydrogen fraction was high enough, part of the unburned hydrogen was mixed with air again to reach an ignitable concentration, resulting in the secondary combustion was easier produced and the duration of the secondary flame increased. With the increase of venting duct length, the flame front distance and propagation velocity increased. Meanwhile, the spatial distribution of pressure field and temperature field, and the propagation process and mechanism of the flame venting with a duct were analyzed using FLUENT software. The variation of the pressure wave and the pressure reflection oscillation law in the explosion venting duct was captured. Therefore, in the industrial explosion venting design with a duct, the hazard caused by the coupling of venting pressure and venting flame under different fractions should be considered comprehensively. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.