空腔体长度对抑制瓦斯爆炸性能的影响研究  

Influence of cavity length on gas explosion suppression

作　　者：周辉 穆朝民[1,2] 刘伟 黄海健 ZHOU Hui;MU Chaomin;LIU Wei;HUANG Haijian(School of Energy and Safety,Anhui University of Science and Technology,Huainan Anhui 232001,China;Key Lab of Safe and Efficient Mining Constructed by Anhui Province and Ministry of Education,Anhui University of Science and Technology,Huainan Anhui 232001,China;Institute of Applied Mechanics,Anhui University of Science and Technology,Huainan Anhui 23001,China)

机构地区：[1]安徽理工大学能源与安全学院,安徽淮南232001 [2]安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001 [3]安徽理工大学应用力学研究所,安徽淮南232001

出　　处：《中国安全科学学报》2019年第9期107-112,共6页China Safety Science Journal

基　　金：国家自然科学基金资助(11472007);安徽省高校自然科学研究项目(KJ2017A092)

摘　　要：为探究直管道中附设的空腔结构长度与瓦斯抑爆效能的关系,设计断面为500 mm×200 mm,长度分别为300、500和800 mm的矩形空腔体,基于自主搭建的长36 m大型瓦斯爆炸试验系统,通过在爆炸管网中铺设不同长度的腔体结构开展抑爆试验。结果表明:不同长度的腔体均能在一定程度上抑制爆炸火焰锋面,且腔体的消焰效果与其长度近似线性相关,在试验范围内最高可使火焰抑制率达76.91%;腔体超压抑制率与长度呈对数函数关系,且腔体抑制超压存在一临界长度,长度为300 mm时,对冲击波超压起促进作用;超压峰值涨幅为9.5%,随着长度由500 mm增至800 mm,腔体对超压抑制率由17.59%提升至28.53%。In order to explore the relationship between length of cavity structure attached to straight pipes and effectiveness of gas explosion suppression,rectangular cavities with a cross-section at 500 mm×200 mm and lengths at 300,500 and 800 mm separately were designed,and then suppression experiments were carried out by applying cavities of different lengths in a self-built 36 m-long gas explosive test system.The results show that cavities of different lengths can suppress explosion flame front to a certain extent.Flame elimination effect of a single cavity is linearly related to its length,and the highest flame suppression rate can reach 76.91%within experimental range.Overpressure inhibition rate is logarithmic to its length,and there exists a critical length of cavity for suppressing overpressure.When it is 300 mm long,overpressure peak will rise by 9.5%while its suppression rate will improve from 17.59%to 28.53%as the length increases from 500 mm to 800 mm.

关 键 词：瓦斯爆炸 爆炸抑制 空腔长度 火焰传播 压力峰值 

分 类 号：X936[环境科学与工程—安全科学]