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Analysis of Smoke Distribution in the Subway Station with Various main tunnel ventilations

Journal of Energy and Power Engineering 2015年第4期9卷 405-410页

作者： Yong-Jun Jang Ji-Min Ryu Sung-Huk Park Dong-Hoe Koo Korea Railroad Research Institute Railroad Safety Center Gyeonggi-do 437-757 South Korea

Fire-driven flow analysis in the underground subway station has been performed with various main tunnel ventilations. Shin-gum-ho station （depth： 46 m） in Seoul is selected as a simulation model. The ventilation mode is assumed to be emergency state. Various main tunnel ventilations are applied to operate in a proper way for helping of smoke exhaustion in platform. The entire station is covered for simulation. ventilation diffusers are modeled as 95 square shapes of 0.6 m × 0.6 m in the lobby and as 222 square shapes of 0.6 m × 0.6 m and four rectangular shapes of 1.2 m × 0.8 m in the platform. The total of 7.5 million grids is generated and whole domain is divided to 22 blocks for MPI （massage passing interface） efficiency of calculation. LES （large eddy simulation） is applied to solve the momentum equation. Smagorinsky model （Cs = 0.2） is used as SGS （subgrid scale） model. The distribution of CO （carbon monoxide） is calculated for various capacity of main tunnel ventilation and compared with each other.

关键词： Subway station main tunnel ventilation fire-driven flow LES.

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Calculation of CO Behavior in the Platform for Deeply Underground Subway Station with Different Fire Strengths

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Journal of Energy and Power Engineering 2016年第3期10卷 199-205页

作者： Yong-Jun Jang Ji-Min Ryu Jong-Ki Kim Min-Chul Chun Dong-Hoe Koo Railroad Safety Center Korea Railroad Research Institute Gyeonggi-do 43 7- 75 7 South Korea

Effect of different fire strengths on the smoke distribution in the subway station is investigated. Shin-Gum-Ho station （line #5） in Seoui 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.

关键词： Carbon monoxide subway station fire strength main tunnel ventilation LES.

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