点火延时对褐煤煤粉爆炸火焰传播过程的影响  

Influence of Ignition Delay on Flame Propagation Lawof Coal Dust Explosion

作　　者：刘静平[1] 焦枫媛 刘毅飞 吴星亮 徐司雨[3] 徐森[1] LIU Jingping;JIAO Fengyuan;LIU Yifei;WU Xingliang;XU Siyu;XU Sen(School of Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;School of Environment and Safety Engineering,North University of China,Taiyuan 030051,China;Science and Technology on Combustion and Explosion Laboratory,Xi’an Modern Chemistry Research Institute,Xi’an 710065,China)

机构地区：[1]南京理工大学化学与化工学院,江苏南京210094 [2]中北大学环境与安全工程学院,山西太原030051 [3]西安近代化学研究所燃烧与爆炸技术重点实验室,陕西西安710065

出　　处：《中北大学学报（自然科学版）》2022年第6期536-540,共5页Journal of North University of China(Natural Science Edition)

基　　金：燃烧与爆炸技术重点实验室基金资助项目(6142603180408)。

摘　　要：煤粉爆炸是爆炸动力学研究的基础科学问题之一,在煤矿井下开采过程中,存在煤粉爆炸的可能性.为了探究点火延时对煤粉火焰传播过程的影响,本文以褐煤粉尘为研究对象,采用粉尘云火焰传播测试系统在不同点火延时下对质量浓度为500g/m^(3)煤粉火焰传播过程进行了研究.用高速摄影装置记录火焰的传播过程,进而分析不同点火延时下煤粉爆炸火焰传播的高度和速度.研究结果表明,随着点火延时的增加,火焰传播高度和火焰传播均呈现先增加后减小趋势,且速度曲线呈现倒“U”型;当点火延时为100 ms时,火焰传播高度和速度均达到最大值,为最佳点火延时.Coal dust explosion is one of the basic scientific problems in explosion dynamics research.There is the possibility of coal dust explosion underground coal mining.To explore the influence of ignition delay on the flame propagation of coal dust,this paper took the lignite dust as the research object,and the flame propagation of coal dust with a concentration of 500 g/m^(3) under different ignition delays was explored by the dust cloud flame propagation test system.The flame propagation was recorded with a high-speed camera,and then the height and speed of coal dust explosion flame propagation under different ignition delays were analyzed.The results show that with the increase in ignition delay,the flame propagation height and speed first increased and then decreased,and the speed curve presents an inverted“U”shape.When the ignition delay is 100 ms,the flame propagation height and speed reach the maximum value,it is the best ignition delay.

关 键 词：褐煤粉尘 点火延时 火焰传播 爆炸过程 

分 类 号：X932[环境科学与工程—安全科学]