IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v12y2018i1p59-d193141.html
   My bibliography  Save this article

Numerical Analysis on the Effect of the Tunnel Slope on the Plug-Holing Phenomena

Author

Listed:
  • Ji Tae Kim

    (School of Mechanical Engineering, Chung-Ang University, Seoul 06974, Korea)

  • Ki-Bae Hong

    (School of Mechanical Engineering, Chung-Ang University, Seoul 06974, Korea)

  • Hong Sun Ryou

    (School of Mechanical Engineering, Chung-Ang University, Seoul 06974, Korea)

Abstract

Preventing the plug-holing phenomena of a natural ventilation system in a shallow underground tunnel is important for improving the ventilation performance, and the tunnel slope has a significant influence on the smoke flow. In this study, the effect of the tunnel slope on plug-holing in a shallow underground tunnel was analyzed by numerical method. The tunnel slope was increased by 0–8 degrees and the fire source was assumed to be 5 MW, which is equivalent to one sedan vehicle. As a result, the possibility of plug-holing decreased as the tunnel slope increased. However, when the tunnel slope is more than 4°, the fresh air from the entrance of the tunnel and smoke are diluted before reaching the shaft, so the flow temperature passing through the shaft is lowered, and the ventilation performance begins to decrease. In particular, plug-holing does not occur at the tunnel slopes of 6 and 8°, but the ventilation performance is expected to decrease because the temperature of the smoke discharged to the shaft is much lower than the general smoke temperature. Therefore, it is necessary to design the natural ventilation system considering the influence of the tunnel slope.

Suggested Citation

  • Ji Tae Kim & Ki-Bae Hong & Hong Sun Ryou, 2018. "Numerical Analysis on the Effect of the Tunnel Slope on the Plug-Holing Phenomena," Energies, MDPI, vol. 12(1), pages 1-8, December.
    • Handle: RePEc:gam:jeners:v:12:y:2018:i:1:p:59-:d:193141
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/12/1/59/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/12/1/59/
    Download Restriction: no
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Ming Tao & Zhixian Hong & Kang Peng & Pengwei Sun & Mingyu Cao & Kun Du, 2019. "Evaluation of Excavation-Damaged Zone around Underground Tunnels by Theoretical Calculation and Field Test Methods," Energies, MDPI, vol. 12(9), pages 1-18, May.
    2. Wangwang Zhou & Xulin Xu & Xiaoqing Li & Shiyun Li, 2023. "Analysis of the Interaction Damage Mechanism and Treatment Measures for an Underpass Landslide Tunnel: A Case from Southwest China," Sustainability, MDPI, vol. 15(14), pages 1-21, July.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:12:y:2018:i:1:p:59-:d:193141. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.