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Metro train carriage combustion behaviors – Full-scale experiment study
Highlights A full-size metro carriage is burned. Initial combustion, combustion development, fully development stages are observed. Total heat release reaches 1009.49 MJ in 3 mins. A series of fitting formulas are obtained, calculating HRR for various fire stages.
Abstract A full-size metro train carriage (internal dimensions 19.1 m × 3.0 m × 2.65 m) is burned to investigate the fire growth process during the initial-3-minute. The heat release rate (HRR), window glass rupture characteristics, fire smoke concentration and inside temperature distribution characteristics are investigated quantitatively. The experiment results show that total heat release (THR) can be up to 1009.49 MJ in 3 mins. It is observed that the fire during the initial-3-minute can be divided into three stages. The t 2 fire, linear growth fire and stable fire are all observed in the initial-3-minute, and a series of fitted HRR is achieved for the three stages. The fire is found to be ventilation controlled after about 26 s, and a formula computing peak stable HRR with known ventilation condition is proposed. The trend of inner carriage smoke temperature, CO2 and CO concentration is investigated to evaluate harm to passengers, and the production coefficient curves of gases are also analyzed. The CO concentration measured by calorimetric system has been fitted by formulas in three stages. The proposed formulas can provide reference for risk assessment, evacuation planning as well as fire rescue.
Metro train carriage combustion behaviors – Full-scale experiment study
Highlights A full-size metro carriage is burned. Initial combustion, combustion development, fully development stages are observed. Total heat release reaches 1009.49 MJ in 3 mins. A series of fitting formulas are obtained, calculating HRR for various fire stages.
Abstract A full-size metro train carriage (internal dimensions 19.1 m × 3.0 m × 2.65 m) is burned to investigate the fire growth process during the initial-3-minute. The heat release rate (HRR), window glass rupture characteristics, fire smoke concentration and inside temperature distribution characteristics are investigated quantitatively. The experiment results show that total heat release (THR) can be up to 1009.49 MJ in 3 mins. It is observed that the fire during the initial-3-minute can be divided into three stages. The t 2 fire, linear growth fire and stable fire are all observed in the initial-3-minute, and a series of fitted HRR is achieved for the three stages. The fire is found to be ventilation controlled after about 26 s, and a formula computing peak stable HRR with known ventilation condition is proposed. The trend of inner carriage smoke temperature, CO2 and CO concentration is investigated to evaluate harm to passengers, and the production coefficient curves of gases are also analyzed. The CO concentration measured by calorimetric system has been fitted by formulas in three stages. The proposed formulas can provide reference for risk assessment, evacuation planning as well as fire rescue.
Metro train carriage combustion behaviors – Full-scale experiment study
Shi, Congling (author) / Zhong, Maohua (author) / Chen, Changkun (author) / Jiao, Weibing (author) / Li, Jian (author) / Zhang, Yulun (author) / Zhang, Lan (author) / Li, Yi (author) / He, Li (author)
2020-07-20
Article (Journal)
Electronic Resource
English
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