Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/19676
Title: The primary characteristics of fire whirls in vertical square channels with a lateral seam
Authors: Wu, HM
Chow, WK 
Gao, Y
Issue Date: 2010
Source: 哈爾濱工程大學學報 (Journal of Harbin Engineering University), 2010, v. 31, no. 3, p. 329-335
Abstract: 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.
Keywords: Central temperature
Fire whirl
Large eddy simulation
Vertical channel with a single slot
Publisher: 中國學術期刊 (光盤版) 電子雜誌社
Journal: 哈爾濱工程大學學報 (Journal of Harbin Engineering University) 
ISSN: 1006-7043
DOI: 10.3969/j.issn.1006-7043.2010.03.010
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