中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (9): 107-112.doi: 10.16265/j.cnki.issn1003-3033.2019.09.017

• 安全工程技术科学 • 上一篇    下一篇

空腔体长度对抑制瓦斯爆炸性能的影响研究

周辉1,2, 穆朝民1,2 教授, 刘伟1,2, 黄海健3   

  1. 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
  • 收稿日期:2019-06-01 修回日期:2019-08-10 出版日期:2019-09-28 发布日期:2020-10-30
  • 作者简介:周 辉 (1995—),男,安徽安庆人,博士研究生,主要研究方向为地下工程、安全防护工程。E-mail:huizhou9509@163.com。
  • 基金资助:
    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)。

Influence of cavity length on gas explosion suppression

ZHOU Hui1,2, MU Chaomin1,2, LIU Wei1,2, HUANG Haijian3   

  1. 1 School of Energy and Safety, Anhui University of Science and Technology, Huainan Anhui 232001, China;
    2 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;
    3 Institute of Applied Mechanics, Anhui University of Science and Technology, Huainan Anhui 23001,China
  • Received:2019-06-01 Revised:2019-08-10 Online:2019-09-28 Published:2020-10-30

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%。

关键词: 瓦斯爆炸, 爆炸抑制, 空腔长度, 火焰传播, 压力峰值

Abstract: 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.

Key words: gas explosion, explosion suppression, length of cavity, flame propagation, pressure peak

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