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Title: Measurements and LES calculations of turbulent premixed flame propagation past repeated obstacles
Authors: Gubba, Sreenivasa Rao
Ibrahim, Salah S.
Malalasekera, W.
Masri, Assaad R.
Keywords: LES
Dynamic flame surface density
Turbulent premixed flames
Influence of the obstacles
Propane/air mixture
Issue Date: 2011
Publisher: © The Combustion Institute. Published by Elsevier Inc.
Citation: GUBBA, S.R., IBRAHIM, S.S., MALALSEKERA, W., and MASRI, A.R., 2011. Measurements and LES calculations of turbulent premixed flame propagation past repeated obstacles. Combustion and Flame, 158 (12), pp. 2465–2481.
Abstract: Measurements and large eddy simulations (LES) have been carried out for a turbulent premixed flame propagating past solid obstacles in a laboratory scale combustion chamber. The mixture used is a stoichiometric propane/air mixture, ignited from rest. A wide range of flow configurations are studied. The configurations vary in terms of the number and position of the built-in solid obstructions. The main aim of the present study is two folded. First, to validate a newly developed dynamic flame surface density (DFSD) model over a wide range of flow conditions. Second, to provide repeatable measurements of the flow and combustion in a well-controlled combustion chamber. A total of four groups are derived for qualitative and quantitative comparisons between predicted results and experimental measurements. The concept of groups offers better understanding of the flame-flow interactions and the impact of number and position of the solid baffle plates with respect to the ignition source. Results are presented and discussed for the flame structure, position, speed and accelerations at different times after ignitions. The pressure-time histories are also presented together with the regimes of combustion for all flow configurations during the course of flame propagation.
Description: This article was published in the journal, Combustion and Flame [© The Combustion Institute. Published by Elsevier Inc.] and the definitive version is available at: http://dx.doi.org/10.1016/j.combustflame.2011.05.008
Version: Accepted for publication
DOI: 10.1016/j.combustflame.2011.05.008
URI: https://dspace.lboro.ac.uk/2134/9125
Publisher Link: http://dx.doi.org/10.1016/j.combustflame.2011.05.008
ISSN: 0010-2180
Appears in Collections:Published Articles (Mechanical and Manufacturing Engineering)

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