Study on the explosion characteristics of natural gas with non-uniform concentration in residential buildings

IF 3.3 3区工程技术 Q2 ENGINEERING, CIVIL

Fire Safety Journal Pub Date : 2025-07-28 DOI:10.1016/j.firesaf.2025.104484

Shihao Li , Jingwen Sun , Xiaobin Li , Xinzhuang Dong , Hua Lv

{"title":"Study on the explosion characteristics of natural gas with non-uniform concentration in residential buildings","authors":"Shihao Li , Jingwen Sun , Xiaobin Li , Xinzhuang Dong , Hua Lv","doi":"10.1016/j.firesaf.2025.104484","DOIUrl":null,"url":null,"abstract":"<div><div>This paper uses CFD software to simulate the pressure characteristics of an indoor non-uniform concentration natural gas explosion. When natural gas is distributed in a longitudinal concentration gradient, explosion overpressure and the degree of overpressure damage decrease as the concentration gradient increases, in comparison to the uniform concentration case, the concentration gradient exerts a pronounced influence on the explosion overpressure. Keeping the living room natural gas concentration constant at 5.3 %, when the concentration of natural gas in the kitchen was 6.3 %, the maximum explosion overpressure and the average explosion impulse exhibited the largest peaks, which reached 20.9 kPa and 706.4 N s, respectively. When the natural gas concentration in the kitchen was maintained at 25 %, the maximum explosion overpressure decreases with the increase of the concentration gradient. The same concentration gradient, and the maximum explosion overpressure under the transverse concentration gradient is always greater than the longitudinal concentration gradient. The results of the study can be used to refine techniques and methods of accident investigation.</div></div>","PeriodicalId":50445,"journal":{"name":"Fire Safety Journal","volume":"157 ","pages":"Article 104484"},"PeriodicalIF":3.3000,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fire Safety Journal","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0379711225001481","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}

引用次数: 0

Abstract

This paper uses CFD software to simulate the pressure characteristics of an indoor non-uniform concentration natural gas explosion. When natural gas is distributed in a longitudinal concentration gradient, explosion overpressure and the degree of overpressure damage decrease as the concentration gradient increases, in comparison to the uniform concentration case, the concentration gradient exerts a pronounced influence on the explosion overpressure. Keeping the living room natural gas concentration constant at 5.3 %, when the concentration of natural gas in the kitchen was 6.3 %, the maximum explosion overpressure and the average explosion impulse exhibited the largest peaks, which reached 20.9 kPa and 706.4 N s, respectively. When the natural gas concentration in the kitchen was maintained at 25 %, the maximum explosion overpressure decreases with the increase of the concentration gradient. The same concentration gradient, and the maximum explosion overpressure under the transverse concentration gradient is always greater than the longitudinal concentration gradient. The results of the study can be used to refine techniques and methods of accident investigation.

查看原文本刊更多论文

非均匀浓度天然气在住宅建筑中的爆炸特性研究

利用CFD软件对室内非均匀浓度天然气爆炸的压力特性进行了数值模拟。当天然气呈纵向浓度梯度分布时，随着浓度梯度的增大，爆炸超压和超压破坏程度减小，与均匀浓度情况相比，浓度梯度对爆炸超压的影响显著。当客厅天然气浓度为5.3%时，厨房天然气浓度为6.3%时，最大爆炸超压和平均爆炸脉冲峰值最大，分别达到20.9 kPa和706.4 N s。当厨房天然气浓度保持在25%时，最大爆炸超压随浓度梯度的增大而减小。相同浓度梯度下，横向浓度梯度下的最大爆炸超压始终大于纵向浓度梯度。研究结果可用于改进事故调查的技术和方法。

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

Fire Safety Journal 工程技术-材料科学：综合

CiteScore

5.70

自引率

9.70%

发文量

153

审稿时长

60 days

期刊介绍： Fire Safety Journal is the leading publication dealing with all aspects of fire safety engineering. Its scope is purposefully wide, as it is deemed important to encourage papers from all sources within this multidisciplinary subject, thus providing a forum for its further development as a distinct engineering discipline. This is an essential step towards gaining a status equal to that enjoyed by the other engineering disciplines.