Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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LARGE EDDY SIMULATION OF ORDINARY & EMERGENCY VENTILATION FLOW IN UNDERGROUND SUBWAY STATION

지하역사 승강장 및 대합실 평상시 비상시 급·배기 환기 Large Eddy Simulation

  • 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)
  • 장용준 (한국철도기술연구원 에코시스템연구실) ;
  • 류지민 (한국철도기술연구원 에코시스템연구실) ;
  • 박덕신 (한국철도기술연구원 에코시스템연구실)
  • Received : 2013.08.28
  • Accepted : 2013.09.30
  • Published : 2013.09.30
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Abstract

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.

Keywords

References

  1. 2012, Jang, Y.-J., Lee, H.-S. and Park, D.-S., "Experimental Study for the Capacity of Ordinary and Emergency Ventilation System in Deeply Underground Subway Station," Journal of The Korean Society for Railway, Vol.15, No.6, pp.579-587. https://doi.org/10.7782/JKSR.2012.15.6.579
  2. 1989, Lee, J.-H. and Oh, M.-D., "Train wind in the subway tunnel," Korean Journal of Air-conditioning and Refrigeration Engineering, Vol.27, No.2, pp.109-114.
  3. 2010, Lee, J.-H., Juraeval, M. and Song, D.-J., "A Numerical Analysis of The Train Wind in The Ventilation System of Subway Tunnel," 2010 Spring Conference for Korean Society for Computational Fluids Engineering, pp.212-215.
  4. 2004, Kim, S.-D., Song, J.-H. and Lee, H.-K., "Estimation of Train-Induced Wind Generated by Train Operation in Subway Tunnels," Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol.16, No.7, pp.652-657.
  5. 2008, Kim, J.-Y., "Development of Optimum Design Technology of Platform Screen Door Systems for the Environment Improvement and Disaster Prevention of Urban Railway," 2008 Winter Conference & Annual Meeting of the Society of Air-condition and Refrigerating Engineers of Korea, pp.84-87.
  6. 2008, Son, B.-S. and Chang, H.-C., "Numerical Prediction of Fire Characteristics of Passenger Train Fire in an Underground Subway Tunnel, Depending on Change of Location of Ventilation Facility," Journal of Korean Institute of Fire Science & Engineering, Vol.22, No.5, pp.1-8.
  7. 2005, Hwang, C.-C. and Edwards, J.-C., "The Critical Ventilation Velocity in Tunnel Fires-A Computer Simulation," Fire Safety Journal, Vol.40, pp.213-244. https://doi.org/10.1016/j.firesaf.2004.11.001
  8. 1986, Hwang, C.-C. and Wargo, J.-D., "Experimental Study of Thermally Generated Reverse Stratified Layers in a Fire Tunnel," Combustion and Flame, Vol.66, pp.171-180. https://doi.org/10.1016/0010-2180(86)90089-1
  9. 1996, Woodburn, P.-J. and Britter, R.-E., "CFD Simulations of a Tunnel Fire-Part I," Fire Safety Journal, Vol.26, pp.35-62. https://doi.org/10.1016/0379-7112(96)00018-5
  10. 1996, Woodburn, P.-J. and Britter, R.-E., "CFD Simulations of a Tunnel Fire-Part II," Fire Safety Journal, Vol.26, pp.63-90. https://doi.org/10.1016/0379-7112(96)00019-7
  11. 2009, Jang, Y.-J., Kim, H.-B., Kim, J.-H. and Han, H.-Y., "Comparative Study on The Numerical Simulation for The Bake-Layer of The Tunnel Fire-Driven Flow with LES and RANS," Transactions of the KSME (B), Vol.33, No.3, pp.156-163. https://doi.org/10.3795/KSME-B.2009.33.3.156
  12. 1994, Fletcher, D.-F., Kent, J.-H. and Apte, V.-B., "Numerical Simulations of Smoke Movement from a pool fire in a ventilated tunnel," Fire Safety Journal, Vol.23, pp.305-325. https://doi.org/10.1016/0379-7112(94)90033-7
  13. 2004, Gao, P.-Z., Liu, S.-L., Chow, W.-K. and Fong, N.-K., "Large Eddy Simulation for Studying Tunnel Smoke Ventilation," Tunneling and Underground Space Technology, Vol.19, pp.577-586. https://doi.org/10.1016/j.tust.2004.01.005
  14. 2009, Jang, Y.-J., Kim, H.-B. and Chang, C.-H., "The Numerical Simulation of Fire Driven Smoke and Heat Flow in the Deeply Underground Subway Station using a Linux Clustering Computer," Proceedings of The KSME Spring Annual Meeting KSME 09TE063.
  15. 2008, Jang, Y.-J., Lee, C.-H., Park, W.-H. and Jung, W.-S., "The Passenger Evacuation Simulation Using Fluent and EXODUS," Journal of The Korean Society for Railway, Vol.11, No.1, pp.95-100.
  16. 2010, McGrattan, K., McDermontt, R., Hostikka, S. and Floyd, J., "Fire Dynamics Simulator (Version 5) User's Guide," NIST.
  17. 2007, Jang, Y.-J. and Park, W.-H., "The Applicability Analysis of FDS code for Fire-Driven Flow Simulation in Railway Tunnel," Journal of The Korean Society for Railway, Vol.10, No.2, pp.224-230.
  18. 1991, Werner, H. and Wengle, H., "Large-eddy simulation of turbulent flow over and around a cube in a plate channel," 8th Symposium on Turbulent Shear Flows., pp. 155-168.
  19. 2011, Jang, Y.-J., "Analysis of Vortex Shedding Phenomena Around Pantograph Panhead for Train Using Large Eddy Simulation," Journal of Computational Fluids Engineering, Vol.16, No.2, pp.17-23. https://doi.org/10.6112/kscfe.2011.16.2.017