Effect of low gas concentration in underground return tunnels on characteristics of gas explosions

Gao, K; Liu, Z; Wu, C; Li, J; Liu, K; Liu, Y; Li, S

Effect of low gas concentration in underground return tunnels on characteristics of gas explosions

Gao, K

Liu, Z Wu, C

Li, J

Liu, K Liu, Y Li, S

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Process Safety and Environmental Protection, 2021, 152, pp. 679-691
Issue Date:: 2021-08-01

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Field	Value	Language
dc.contributor.author	Gao, K https://orcid.org/0000-0002-7211-6403
dc.contributor.author	Liu, Z
dc.contributor.author	Wu, C https://orcid.org/0000-0001-6786-7934
dc.contributor.author	Li, J https://orcid.org/0000-0003-2457-1994
dc.contributor.author	Liu, K
dc.contributor.author	Liu, Y
dc.contributor.author	Li, S
dc.date.accessioned	2022-03-07T04:19:10Z
dc.date.available	2022-03-07T04:19:10Z
dc.date.issued	2021-08-01
dc.identifier.citation	Process Safety and Environmental Protection, 2021, 152, pp. 679-691
dc.identifier.issn	0957-5820
dc.identifier.issn	1744-3598
dc.identifier.uri	http://hdl.handle.net/10453/155016
dc.description.abstract	This study numerically investigated the effect of a very low gas concentration on a gas explosion's performance numerically using OpenFOAM. The use of the Harten–Lax–van Leer–Contact (HLLC) approximation algorithm based on the density-based solver was proposed to capture the shock wave. The process variable in XiFOAM of the OpenFOAM toolbox was used for the deflagration reaction. A gas explosion test was performed, and the numerical model with OpenFOAM was validated using the testing data. Based on the numerical investigation, the influence of a very low methane concentration on the flame and shock wave propagation law of a gas explosion was analyzed. It showed that the flame initially accelerated, followed by deceleration, and then accelerated again before slowing down. An increase in the methane concentration had an enhanced effect on the maximum overpressure ratio, which increased linearly with an increase in the methane concentration from 0 vol. % to 3.0 vol. % in the return tunnels. Increasing the explosive methane volume and concentration caused a significant increase in the flame spread distance. It was also noted that increasing the methane concentration caused a linear increase in the maximum overpressure ratio, and the methane volume and concentration both had a sensitive effects on the maximum overpressure ratio and average overpressure rising rate. The results clarified how the gas explosion law was affected by a very low gas concentration and provided theoretical support for controlling gas explosion disasters.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Process Safety and Environmental Protection
dc.relation.isbasedon	10.1016/j.psep.2021.06.045
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0102 Applied Mathematics, 0904 Chemical Engineering, 0911 Maritime Engineering, 0914 Resources Engineering and Extractive Metallurgy
dc.subject.classification	Chemical Engineering
dc.subject.classification	Strategic, Defence & Security Studies
dc.title	Effect of low gas concentration in underground return tunnels on characteristics of gas explosions
dc.type	Journal Article
utslib.citation.volume	152
utslib.for	0102 Applied Mathematics
utslib.for	0904 Chemical Engineering
utslib.for	0911 Maritime Engineering
utslib.for	0914 Resources Engineering and Extractive Metallurgy
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2022-03-07T04:19:08Z
pubs.publication-status	Published
pubs.volume	152

Abstract:

This study numerically investigated the effect of a very low gas concentration on a gas explosion's performance numerically using OpenFOAM. The use of the Harten–Lax–van Leer–Contact (HLLC) approximation algorithm based on the density-based solver was proposed to capture the shock wave. The process variable in XiFOAM of the OpenFOAM toolbox was used for the deflagration reaction. A gas explosion test was performed, and the numerical model with OpenFOAM was validated using the testing data. Based on the numerical investigation, the influence of a very low methane concentration on the flame and shock wave propagation law of a gas explosion was analyzed. It showed that the flame initially accelerated, followed by deceleration, and then accelerated again before slowing down. An increase in the methane concentration had an enhanced effect on the maximum overpressure ratio, which increased linearly with an increase in the methane concentration from 0 vol. % to 3.0 vol. % in the return tunnels. Increasing the explosive methane volume and concentration caused a significant increase in the flame spread distance. It was also noted that increasing the methane concentration caused a linear increase in the maximum overpressure ratio, and the methane volume and concentration both had a sensitive effects on the maximum overpressure ratio and average overpressure rising rate. The results clarified how the gas explosion law was affected by a very low gas concentration and provided theoretical support for controlling gas explosion disasters.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/155016