CUED Publications database

Flame interactions in turbulent premixed twin V-flames

Dunstan, TD and Swaminathan, N and Bray, KNC and Kingsbury, NG (2013) Flame interactions in turbulent premixed twin V-flames. Combustion Science and Technology, 185. pp. 134-159. ISSN 0010-2202

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Abstract

Multiple flame-flame interactions in premixed combustion are investigated using direct numerical simulations of twin turbulent V-flames for a range of turbulence intensities and length scales. Interactions are identified using a novel automatic feature extraction (AFE) technique, based on data registration using the dual-tree complex wavelet transform. Information on the time, position, and type of interactions, and their influence on the flame area is extracted using AFE. Characteristic length and time scales for the interactions are identified. The effect of interactions on the flame brush is quantified through a global stretch rate, defined as the sum of flamelet stretch and interaction stretch contributions. The effects of each interaction type are discussed. It is found that the magnitude of the fluctuations in flamelet and interaction stretch are comparable, and a qualitative sensitivity to turbulence length scale is found for one interaction type. Implications for modeling are discussed. © 2013 Copyright Taylor and Francis Group, LLC.

Item Type: Article
Uncontrolled Keywords: Data registration Dual-tree complex wavelet transform Flame stretch Wavelets
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Div F > Signal Processing and Communications
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:42
Last Modified: 08 Dec 2014 02:30
DOI: 10.1080/00102202.2012.713413