한국전산유체공학회지 (Journal of computational fluids engineering)

한국전산유체공학회 (Korean Society of Computational Fluids Engineering)
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지하역사 승강장 및 대합실 평상시 비상시 급·배기 환기 Large Eddy Simulation

LARGE EDDY SIMULATION OF ORDINARY & EMERGENCY VENTILATION FLOW IN UNDERGROUND SUBWAY STATION

  • 장용준 (한국철도기술연구원 에코시스템연구실) ;
  • 류지민 (한국철도기술연구원 에코시스템연구실) ;
  • 박덕신 (한국철도기술연구원 에코시스템연구실)
  • Jang, Yong-Jun (EcoSystem Research Center, Korea Railroad Research Institute) ;
  • Ryu, Ji-Min (EcoSystem Research Center, Korea Railroad Research Institute) ;
  • Park, Duck-Shin (EcoSystem Research Center, Korea Railroad Research Institute)
  • 투고 : 2013.08.28
  • 심사 : 2013.09.30
  • 발행 : 2013.09.30
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초록

The turbulent flow behavior of air supply and exhaustion in the Shin-gum-ho subway station is analyzed for ordinary and emergency state. The depth of Shin-gum-ho station is 43.6m which consists of the island-type platform(8th floor in underground) and a two-story lobby (first & second floor in underground). An emergency stairway connects between the platform and the lobby. Ventilation operation mode for ordinary state is set up as a combination of air supply and exhaustion in the lobby and platform, while for emergency state it is set up as a full air supply in the lobby and a full exhaustion in the platform. The entire station is covered for simulation. The ventilation diffusers are modeled as 95 square shapes of $0.6m{\times}0.6m$ in the lobby and as 222 square shapes of $0.6m{\times}0.6m$ and 4 rectangular shapes of $1.2m{\times}0.8m$ in the platform. The total of 7.5million grids are generated and whole domain is divided to 22 blocks for MPI efficiency of calculation. Large eddy simulation(LES) is applied to solve the momentum equation and Smagorinsky model($C_s$=0.2) is used as SGS(subgrid scale) model. The time-averaged velocity fields are compared to experimental data and show a good agreement with it.

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참고문헌

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