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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Yong-Jun Jang, Ji-Min Ryu, Jong-Ki Kim, Min-Chul Chun and Dong-Hoe Koo
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DOI:10.17265/1934-8975/2016.03.008
Affiliation(s)
Railroad Safety Center, Korea Railroad Research Institute, Gyeonggi-do 437-757, South Korea
ABSTRACT
Effect
of different fire strengths on the smoke distribution in the subway station is investigated.
Shin-Gum-Ho station (line #5) in Seoul is selected as a case study for variation of CO (carbon monoxide) distribution caused by the fire in the platform. The ventilation in the station is set to be an air supply mod in the
lobby and an air exhaustion mod in the platform. One-side main tunnel ventilation
(7,000 m³/min) is applied to operate in the tunnel. The fire is assumed
to break out in the middle of train parked in the platform tunnel. Two kinds of
fire strength are used. One is 10 MW and the other is 20 MW. Ventilation diffusers in the station are modeled as 317 square shapes & four rectangular shapes in the
lobby and platform. The total of 7.5 million grids is generated and whole domain is divided to 22 blocks for
parallel computation. Large eddy simulation method is applied to solve the momentum equation. The behavior of CO is calculated according to different fire strengths
and compared with each other.
KEYWORDS
Carbon monoxide, subway station, fire strength, main tunnel ventilation, LES.
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