爆炸过程中预混气体流动状态对甲烷爆炸影响分析  

Analysis of influence of premixed gas flow state on methane explosion during explosion

作　　者：张丽[1] 康青春 杨克[1] 纪虹[1] 方奇明 Zhang Li;Kang Qingchun;Yang Ke;Ji Hong;Xing Zhixiang(School of Safety Science and Engineering,Changzhou University,Changzhou Jiangsu 213164,China)

机构地区：[1]常州大学安全科学与工程学院,江苏常州213164

出　　处：《消防科学与技术》2025年第1期35-40,共6页Fire Science and Technology

基　　金：国家自然科学基金项目(52204204)。

摘　　要：通过自主搭建的可视化水平长直管道甲烷爆炸试验平台,利用在管道尾端安装的可变速小风扇制造与火焰传播方向相同、相反的不同流速的预混气气流,研究变速气流对甲烷/空气混合燃料的爆炸火焰传播特性与爆炸超压特性等的影响。结果表明:变速气流对甲烷爆炸燃烧具有一定的促进作用。随着气流速度的增加,促进甲烷爆炸燃烧的效果逐渐增加。但是随着气流速度的逐步增加,对于单相对流气体,甲烷爆炸的促进效果呈现先上升后下降的趋势;对于单相同流气体,随着气流强度的提高,一直表现出对甲烷爆炸的促进。同时,火焰在接近尾端风扇时发生振荡现象。The effects of variable velocity on the explosion flame propagation characteristics and explosion overpressure characteristics of methane/air mixed fuel were studied by a self-built visual methane explosion experiment platform with a variable velocity small fan installed at the end of the pipeline to produce premixed gas flow with the same and opposite flame propagation direction.The results show that variable velocity gas flow can promote methane explosion combustion to some extent.With the increase of gas velocity,the effect of promoting methane explosion combustion gradually increases.However,with the increase of gas velocity,for single-phase convection gas,the effect of promoting methane explosion begins to decrease with the increase of opposite flow intensity.For a single homogeneous flow gas,with the increase of the intensity of the flow,it has been shown to promote the explosion of methane.At the same time,the flame oscillates when approaching the tail fan.

关 键 词：甲烷爆炸 气流速度 火焰图像 火焰速度 爆炸超压 

分 类 号：X932[环境科学与工程—安全科学] TE88[石油与天然气工程—油气储运工程]