Numerical study of the effect of wall temperature profiles on the premixed methane–air flame dynamics in a narrow channel

Kang, Xin, Gollan, Rowan J., Jacobs, Peter A. and Veeraragavan, Ananthanarayanan (2017) Numerical study of the effect of wall temperature profiles on the premixed methane–air flame dynamics in a narrow channel. RSC Advances, 7 63: 39940-39954. doi:10.1039/C7RA07265A

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Author Kang, Xin
Gollan, Rowan J.
Jacobs, Peter A.
Veeraragavan, Ananthanarayanan
Title Numerical study of the effect of wall temperature profiles on the premixed methane–air flame dynamics in a narrow channel
Journal name RSC Advances   Check publisher's open access policy
ISSN 2046-2069
Publication date 2017-08-16
Sub-type Article (original research)
DOI 10.1039/C7RA07265A
Open Access Status File (Publisher version)
Volume 7
Issue 63
Start page 39940
End page 39954
Total pages 15
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Language eng
Formatted abstract
Time-accurate simulations of premixed CH4/air flame in a narrow, heated channel are performed using the DRM-19 reaction mechanism. The effect of different wall temperature profiles on the flame dynamics is investigated for three different inflow velocity conditions. At a low inflow velocity of 0.2 m s−1, the flame shows instabilities in the form of spatial oscillations and even flame extinction. With the increase of the inflow velocity, flames are prone to showing more stability at a medium inflow velocity of 0.4 m s−1, and eventually show flame stabilisation at a high inflow velocity condition of 0.8 m s−1 for all the wall temperature profiles examined. The total chemical heat release rate and total gas–solid heat exchange rate are found to have a combined effect on the flame propagation speed that determines flame behaviours. Since the flame behaviours in terms of the oscillation frequency and amplitude for spatially oscillating flames, or the stream-wise stabilisation location for steady-state flames, are very sensitive to the chosen wall temperature profile, a “real” conjugate heat transfer model is recommended in order to capture all of the relevant combustion physics accurately.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
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Created: Fri, 25 Aug 2017, 08:01:26 EST by Anand Veeraragavan on behalf of School of Mechanical and Mining Engineering