Propagation Characteristics of Dual Explosive Sources Gas Explosion in Different Arrangements in H-Type Tunnel

YE Qing; WANG Weijian; JIA Zhenzhen; LIU Jialin

doi:10.11858/gywlxb.20230760

Volume 38 Issue 2

Apr 2024

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Chinese Journal of High Pressure Physics > 2024 > 38(2): 025201.

YE Qing, WANG Weijian, JIA Zhenzhen, LIU Jialin. Propagation Characteristics of Dual Explosive Sources Gas Explosion in Different Arrangements in H-Type Tunnel[J]. Chinese Journal of High Pressure Physics, 2024, 38(2): 025201. doi: 10.11858/gywlxb.20230760

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YE Qing, WANG Weijian, JIA Zhenzhen, LIU Jialin. Propagation Characteristics of Dual Explosive Sources Gas Explosion in Different Arrangements in H-Type Tunnel[J]. Chinese Journal of High Pressure Physics, 2024, 38(2): 025201. doi: 10.11858/gywlxb.20230760

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Propagation Characteristics of Dual Explosive Sources Gas Explosion in Different Arrangements in H-Type Tunnel

doi: 10.11858/gywlxb.20230760

YE Qing^1
,,
WANG Weijian^{1, 2,*
,
,},
JIA Zhenzhen¹,
LIU Jialin¹

1.
College of Resources, Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411100, Hunan, China
2.
School of Physics and Engineering Technology, Minzu Normal University of Xingyi, Xingyi 562400, Guizhou, China

Received Date: 17 Oct 2023
Rev Recd Date: 10 Dec 2023

Available Online: 20 Mar 2024

Issue Publish Date: 09 Apr 2024

Abstract

Abstract

In order to investigate the propagation characteristics and thermal shock dynamics of multiple explosive sources gas explosion in complex roadways, numerical simulations were conducted using the Fluent software under three types of dual explosive sources arrangements in the H-type tunnel, including the same side, opposite positions, and diagonal positions. It was found that, after the two explosive sources in the tunnel were ignited simultaneously, its prodromic shock wave propagated along the unburned area of the tunnel. When the two shock waves encountered, the pressure superimposed while the impulse canceled out, and the propagation of flame was blocked by the pressure superposition area, resulting in a slowdown or reversal of the speed. Compared to the single source explosion, the dual explosive sources led to a higher pressure in specific areas such as contact lane, center of bifurcation, and sidewalls. Extreme pressure zones occur at the closed end of the roadway under same-side and diagonal arrangement conditions and at the center of the bifurcation under the opposite arrangement condition.
- gas explosion,
- H-type tunnel,
- arrangement,
- shock wave,
- propagation characteristics

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References(23)

References

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Propagation Characteristics of Dual Explosive Sources Gas Explosion in Different Arrangements in H-Type Tunnel

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