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A numerical study on smoke layering plugholing under mechanical extraction in a long channel

  • State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China

Cite this: JUSTC, 2009, 39(4): 424-428
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  • Received Date: January 03, 2008
  • Revised Date: September 10, 2008
  • Published Date: April 29, 2009
    Abstract
  • In a long model channel under mechanical extraction, the flow pattern, vertical temperature distribution and depth of the smoke layer below the extraction vent were analyzed by numerical modeling. The variations of the depth and temperature under different mechanical extraction rates were quantitatively described. The results show that plugholing occurs in the long channel when smoke extraction rate increases to some relative high levels, causing the efficiency of the mechanical extraction system to be reduced.
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