On the effects of density changes in firewhirls

Dowd, C. (2013). On the effects of density changes in firewhirls. In: Mingming Zhu, Yu Ma, Yun Yu, Hari Vuthaluru, Zhezi Zhang and Dongke Zhang, Australian Combustion Symposium 2013: Proceedings. ACS2013: Australian Combustion Symposium 2013, Crawley, WA, Australia, (124-127). 6-8 November, 2013.

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Name Description MIMEType Size Downloads
Author Dowd, C.
Title of paper On the effects of density changes in firewhirls
Conference name ACS2013: Australian Combustion Symposium 2013
Conference location Crawley, WA, Australia
Conference dates 6-8 November, 2013
Proceedings title Australian Combustion Symposium 2013: Proceedings
Journal name Proceedings of the Australian Combustion Symposium
Place of Publication Sydney, NSW, Australia
Publisher The Combustion Institute: Australia and New Zealand Section
Publication Year 2013
Sub-type Fully published paper
ISBN 1839-8170
Editor Mingming Zhu
Yu Ma
Yun Yu
Hari Vuthaluru
Zhezi Zhang
Dongke Zhang
Start page 124
End page 127
Total pages 4
Collection year 2014
Language eng
Formatted Abstract/Summary
This work investigates the effects of the density changes within firewhirls and their impact on the flame lengthening mechanism, in particular the mechanism proposed by Klimenko et al based on the strong vortex compensation regime. This is conducted through running a number of numerical simulations of both buoyant and constant density firewhirls using the openFOAM computational fluid dynamics package. In particular, modifications have been made to the proven fireFoam solver packaged with openFOAM to allow for a rotating reference frame and constant density reacting flows. The results demonstrate that the flame elongation occurs regardless of any changes in density and that it is linked with the generation of tangential vorticity within the flame in both buoyant and non-buoyant cases, supporting the analysis of Klimenko et al. A shortening of the flame length in buoyant cases at low rotations is also found, which seems to result from interference between the baroclinic vorticity of the non-whirling flame and the axial vorticity of the whirling flame.
Keyword Fire
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

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Created: Tue, 04 Mar 2014, 15:01:06 EST by Katie Gollschewski on behalf of School of Mechanical and Mining Engineering