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A platform for research: civil engineering, architecture and urbanism
Model-Scale Fire Experiments and Simulations of a Tunnel with Point-Extraction Ventilation
In recent years, the application of point-extraction ventilation systems in road tunnels has attracted worldwide attention. Considering the experience of tunnel fire disasters, Taiwan Eastern Highway Project with eight tunnels about to open to traffic has also adopted this type of ventilation system. However, the smoke layers are possibly diffused by the exhaust flow in the vicinity of the extraction vent during emergency ventilation when a tunnel fire and then the smoke could deteriorate the evacuation environment. This study used Froude-scaling methods and dimensionless models to simulate experimental conditions with CFD software (our original code). These simulations of smoke distribution were compared with results from experiments with a 1:5 scale-model tunnel equipped with a point-extraction ventilation system. The predictions of smoke propagation derived by the original code are in good agreement with the scale-model experiment results. Furthermore, through conformed the CFD cord accuracy, we could have the prediction and understand the smoke behaviour affected by this type of ventilation system, in order to assess the influence on the safety of evacuation environment in full-scale tunnel fire accident.
Model-Scale Fire Experiments and Simulations of a Tunnel with Point-Extraction Ventilation
In recent years, the application of point-extraction ventilation systems in road tunnels has attracted worldwide attention. Considering the experience of tunnel fire disasters, Taiwan Eastern Highway Project with eight tunnels about to open to traffic has also adopted this type of ventilation system. However, the smoke layers are possibly diffused by the exhaust flow in the vicinity of the extraction vent during emergency ventilation when a tunnel fire and then the smoke could deteriorate the evacuation environment. This study used Froude-scaling methods and dimensionless models to simulate experimental conditions with CFD software (our original code). These simulations of smoke distribution were compared with results from experiments with a 1:5 scale-model tunnel equipped with a point-extraction ventilation system. The predictions of smoke propagation derived by the original code are in good agreement with the scale-model experiment results. Furthermore, through conformed the CFD cord accuracy, we could have the prediction and understand the smoke behaviour affected by this type of ventilation system, in order to assess the influence on the safety of evacuation environment in full-scale tunnel fire accident.
Model-Scale Fire Experiments and Simulations of a Tunnel with Point-Extraction Ventilation
Wu, Guan-Yuan (editor) / Tsai, Kuang-Chung (editor) / Chow, W. K. (editor) / Huang, Ti-Sheng (author) / Kawabata, Nobuyoshi (author) / Seike, Miho (author) / Hasegawa, Masato (author) / Tanaka, Futoshi (author) / Chien, Shen-Wen (author) / Shen, Tzu-Sheng (author)
Asia-Oceania Symposium on Fire Science and Technology ; 2018 ; Taipei, Taiwan
The Proceedings of 11th Asia-Oceania Symposium on Fire Science and Technology ; Chapter: 74 ; 1031-1046
2020-01-01
16 pages
Article/Chapter (Book)
Electronic Resource
English
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