Investigation on the Synergy Effect of Water Mist and Porous Medium on the Gas Explosion under Different Equivalence Ratios

IF 3.4
Kang Cen, , , Yanling Yang*, , , Yulong Duan, , , Hongfu Mi, , , Gang Xi*, , and , Shuo Wang, 
{"title":"Investigation on the Synergy Effect of Water Mist and Porous Medium on the Gas Explosion under Different Equivalence Ratios","authors":"Kang Cen,&nbsp;, ,&nbsp;Yanling Yang*,&nbsp;, ,&nbsp;Yulong Duan,&nbsp;, ,&nbsp;Hongfu Mi,&nbsp;, ,&nbsp;Gang Xi*,&nbsp;, and ,&nbsp;Shuo Wang,&nbsp;","doi":"10.1021/acs.chas.5c00097","DOIUrl":null,"url":null,"abstract":"<p >As the operating years of the underground integrated pipe increase and the aging of various pipelines progresses, as well as coal mining operations, the potential risks of fire and explosion gradually rise. To effectively alleviate the harm caused by explosion accidents, a synergistic suppression method is proposed. This paper aimed to study the synergistic effects of porous sliding devices and water mist on methane/air explosions with different equivalent ratios by changing the porosity of porous medium and spray pressure. The results indicate that the combined use of porous sliding devices and water mist yields better synergistic suppression effects in terms of the explosion overpressure and the flame propagation velocity. Based on the orthogonal test results, the optimal synergistic combination was obtained, that is, a porosity of 60 PPI and a spray pressure of 0.1 MPa. The flame propagation velocity with Φ <i>=</i> 1.0 decreases by 17.91%, and the peak overpressure rate of explosion decreases by 34.72%. In addition, the relationship between explosion energy, flame propagation velocity, and explosion overpressure is established according to the Buckingham Π theorem. The establishment of the model and the experimental results have important theoretical significance for evaluating the degree of explosion risk after the addition of synergistic devices. Finally, the suppression mechanism of the synergistic device in the methane/air explosion process was elucidated by combining the key free radicals and basic reactions involved in the methane explosion process through chemical kinetics simulations. This study can provide numerical data support and a theoretical reference for active suppression systems applied in realistic scenarios.</p>","PeriodicalId":73648,"journal":{"name":"Journal of chemical health & safety","volume":"32 5","pages":"624–636"},"PeriodicalIF":3.4000,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of chemical health & safety","FirstCategoryId":"1085","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.chas.5c00097","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

Abstract

As the operating years of the underground integrated pipe increase and the aging of various pipelines progresses, as well as coal mining operations, the potential risks of fire and explosion gradually rise. To effectively alleviate the harm caused by explosion accidents, a synergistic suppression method is proposed. This paper aimed to study the synergistic effects of porous sliding devices and water mist on methane/air explosions with different equivalent ratios by changing the porosity of porous medium and spray pressure. The results indicate that the combined use of porous sliding devices and water mist yields better synergistic suppression effects in terms of the explosion overpressure and the flame propagation velocity. Based on the orthogonal test results, the optimal synergistic combination was obtained, that is, a porosity of 60 PPI and a spray pressure of 0.1 MPa. The flame propagation velocity with Φ = 1.0 decreases by 17.91%, and the peak overpressure rate of explosion decreases by 34.72%. In addition, the relationship between explosion energy, flame propagation velocity, and explosion overpressure is established according to the Buckingham Π theorem. The establishment of the model and the experimental results have important theoretical significance for evaluating the degree of explosion risk after the addition of synergistic devices. Finally, the suppression mechanism of the synergistic device in the methane/air explosion process was elucidated by combining the key free radicals and basic reactions involved in the methane explosion process through chemical kinetics simulations. This study can provide numerical data support and a theoretical reference for active suppression systems applied in realistic scenarios.

Abstract Image

不同当量比下细水雾和多孔介质对瓦斯爆炸协同效应的研究
随着地下综合管道使用年限的增加和各种管道老化的推进,以及煤矿开采作业,火灾爆炸的潜在风险逐渐上升。为了有效减轻爆炸事故的危害,提出了一种协同抑制方法。本文旨在通过改变多孔介质孔隙率和喷雾压力,研究多孔滑动装置和水雾对不同当量比的甲烷/空气爆炸的协同效应。结果表明,多孔滑动装置与水雾的联合使用在爆炸超压和火焰传播速度方面具有较好的协同抑制效果。根据正交试验结果,得到了最佳的协同组合,即孔隙率为60 PPI,喷射压力为0.1 MPa。当Φ = 1.0时,火焰传播速度降低了17.91%,爆炸峰值超压率降低了34.72%。此外,根据Buckingham Π定理建立了爆炸能量、火焰传播速度与爆炸超压之间的关系。该模型的建立和实验结果对评价增效装置后的爆炸危险程度具有重要的理论意义。最后,通过化学动力学模拟,结合甲烷爆炸过程中涉及的关键自由基和碱性反应,阐明了协同装置在甲烷/空气爆炸过程中的抑制机理。该研究可为主动抑制系统在实际应用中提供数值数据支持和理论参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
CiteScore
4.20
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信