The primary characteristics of fire whirls in vertical square channels with a lateral seam

Hong Mei Wu, Wan Ki Chow, Ye Gao

Research output: Journal article publicationJournal articleAcademic researchpeer-review


A fire whirl is simply a vortex flow with combustion. To understand the mechanism generating fire whirls, large scale experiments were conducted in a vertical square channel (2.0 m × 2.0 m × 15.0 m) with a lateral seam. They were also simulated with computational fluid dynamics (CFD) using fire dynamics simulator (FDS) version 4.07 which includes a method for large eddy simulation. To investigate the primary characteristics of fire whirls, five cases were simulated, each using a different bottom vent. It was found that when three edges at the bottom of the channel connect with the ambient a fire whirl cannot be produced. The other four cases produced one. In those cases, the distribution rule of temperature and axial velocity of the fire whirl at the channel centerline with the changing of height was presented. Next, the observed shifting of the central axis of the fire whirl from the channel's centerline was analyzed. It was also noted that the positions of the top of the flame in the fire whirl were incontinuous.
Original languageChinese (Simplified)
Pages (from-to)329-335
Number of pages7
JournalHarbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University
Issue number3
Publication statusPublished - 1 Mar 2010


  • Central temperature
  • Fire whirl
  • Large eddy simulation
  • Vertical channel with a single slot

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Chemical Engineering(all)
  • Nuclear Energy and Engineering
  • Aerospace Engineering
  • Mechanical Engineering

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