Numerical Simulation of a Fire Accident in a Longitudinally Ventilated Railway Tunnel and Tenability Analysis
The present study examines the prevailing conditions in a railway tunnel after a train fire accident and the ability of the ventilation system to create the proper conditions for a safe passenger evacuation. The examined scenario included an event of a 20-MW diesel pool fire on a suburban train, imm...
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| Format: | Article |
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MDPI AG
2022-06-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/11/5667 |
| _version_ | 1797494038365995008 |
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| author | Thomas Zisis Konstantinos Vasilopoulos Ioannis Sarris |
| author_facet | Thomas Zisis Konstantinos Vasilopoulos Ioannis Sarris |
| author_sort | Thomas Zisis |
| collection | DOAJ |
| description | The present study examines the prevailing conditions in a railway tunnel after a train fire accident and the ability of the ventilation system to create the proper conditions for a safe passenger evacuation. The examined scenario included an event of a 20-MW diesel pool fire on a suburban train, immobilized in the middle of a 1.5-Km long, linear shaped rectangular tunnel ventilated by a longitudinal jet fan system, and the people’s movement during the evacuation was effectuated along walking platforms. More specifically, three scenarios with different fan activation times and different evacuation processes were examined. A Large Eddy simulation model (LES) was used for the simulation of the air flow in the railway tunnel. The evaluation of the ventilation system criteria considered the achievement of the air critical velocity inside the railway tunnel, and for the people’s safe evacuation, the Fractional Effective Dose (FED) value was examined. It was found that the most important action in a tunnel fire is the time, after the start of a fire, the ventilation system is activated. |
| first_indexed | 2024-03-10T01:28:34Z |
| format | Article |
| id | doaj.art-42e8f71af41841f796b38b6f4ff56470 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T01:28:34Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-42e8f71af41841f796b38b6f4ff564702023-11-23T13:45:50ZengMDPI AGApplied Sciences2076-34172022-06-011211566710.3390/app12115667Numerical Simulation of a Fire Accident in a Longitudinally Ventilated Railway Tunnel and Tenability AnalysisThomas Zisis0Konstantinos Vasilopoulos1Ioannis Sarris2Laboratory of Thermo Fluid Systems (LTFS), Department of Mechanical Engineering, Ancient Olive Grove Campus, University of West Attica, Thivon Str. 250, Egaleo, 12244 Athens, GreeceLaboratory of Thermo Fluid Systems (LTFS), Department of Mechanical Engineering, Ancient Olive Grove Campus, University of West Attica, Thivon Str. 250, Egaleo, 12244 Athens, GreeceLaboratory of Thermo Fluid Systems (LTFS), Department of Mechanical Engineering, Ancient Olive Grove Campus, University of West Attica, Thivon Str. 250, Egaleo, 12244 Athens, GreeceThe present study examines the prevailing conditions in a railway tunnel after a train fire accident and the ability of the ventilation system to create the proper conditions for a safe passenger evacuation. The examined scenario included an event of a 20-MW diesel pool fire on a suburban train, immobilized in the middle of a 1.5-Km long, linear shaped rectangular tunnel ventilated by a longitudinal jet fan system, and the people’s movement during the evacuation was effectuated along walking platforms. More specifically, three scenarios with different fan activation times and different evacuation processes were examined. A Large Eddy simulation model (LES) was used for the simulation of the air flow in the railway tunnel. The evaluation of the ventilation system criteria considered the achievement of the air critical velocity inside the railway tunnel, and for the people’s safe evacuation, the Fractional Effective Dose (FED) value was examined. It was found that the most important action in a tunnel fire is the time, after the start of a fire, the ventilation system is activated.https://www.mdpi.com/2076-3417/12/11/5667railway tunnel fireFDStunnel ventilationtenability analysisnumerical simulation |
| spellingShingle | Thomas Zisis Konstantinos Vasilopoulos Ioannis Sarris Numerical Simulation of a Fire Accident in a Longitudinally Ventilated Railway Tunnel and Tenability Analysis Applied Sciences railway tunnel fire FDS tunnel ventilation tenability analysis numerical simulation |
| title | Numerical Simulation of a Fire Accident in a Longitudinally Ventilated Railway Tunnel and Tenability Analysis |
| title_full | Numerical Simulation of a Fire Accident in a Longitudinally Ventilated Railway Tunnel and Tenability Analysis |
| title_fullStr | Numerical Simulation of a Fire Accident in a Longitudinally Ventilated Railway Tunnel and Tenability Analysis |
| title_full_unstemmed | Numerical Simulation of a Fire Accident in a Longitudinally Ventilated Railway Tunnel and Tenability Analysis |
| title_short | Numerical Simulation of a Fire Accident in a Longitudinally Ventilated Railway Tunnel and Tenability Analysis |
| title_sort | numerical simulation of a fire accident in a longitudinally ventilated railway tunnel and tenability analysis |
| topic | railway tunnel fire FDS tunnel ventilation tenability analysis numerical simulation |
| url | https://www.mdpi.com/2076-3417/12/11/5667 |
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