International Journal of Earth Sciences and Engineering

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Numerical Simulation Study on Fire Resistance and Thermal Roundabout Flow Phenomenon of the Tunnel Fire


Affiliations
1 China University of Mining and Technology (Beijing), Beijing, China
2 Taiyuan University of Technology, Taiyuan, China
 

Basing on thermodynamics and fluid mechanics, the viscous hindering effect of mine fire on fluid flow and throttling effect were analyzed in detail. Beyond that, fire resistance was classified according to various generation mechanisms. Fire resistance was composed of local resistance formed by barrier effect of flame and viscous frictional resistance formed by thermal plume. Numerical simulation experiments showed that the viscous resistance of the air flow becomes larger once a fire occurs in the tunnel, and it increases with the scale of fire. Throttling effect is influenced by fire scale and inlet airflow rate. It increases with the scale of fire and decreases with the increasing of inlet airflow rate. Study results have important practical significance for the simulation of the mine fire and the guidance of scientific disaster relief.

Keywords

Tunnel Fire, Heat Resistance, Throttling Effect, Fluent, Reverse Flow.
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  • Numerical Simulation Study on Fire Resistance and Thermal Roundabout Flow Phenomenon of the Tunnel Fire

Abstract Views: 153  |  PDF Views: 161

Authors

Zhuoming Yang
China University of Mining and Technology (Beijing), Beijing, China
Bing Wu
China University of Mining and Technology (Beijing), Beijing, China
Yaojiang Zhao
Taiyuan University of Technology, Taiyuan, China
Jinxin Huang
China University of Mining and Technology (Beijing), Beijing, China
Yong Li
China University of Mining and Technology (Beijing), Beijing, China

Abstract


Basing on thermodynamics and fluid mechanics, the viscous hindering effect of mine fire on fluid flow and throttling effect were analyzed in detail. Beyond that, fire resistance was classified according to various generation mechanisms. Fire resistance was composed of local resistance formed by barrier effect of flame and viscous frictional resistance formed by thermal plume. Numerical simulation experiments showed that the viscous resistance of the air flow becomes larger once a fire occurs in the tunnel, and it increases with the scale of fire. Throttling effect is influenced by fire scale and inlet airflow rate. It increases with the scale of fire and decreases with the increasing of inlet airflow rate. Study results have important practical significance for the simulation of the mine fire and the guidance of scientific disaster relief.

Keywords


Tunnel Fire, Heat Resistance, Throttling Effect, Fluent, Reverse Flow.