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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/5566

Title: Calculations of explosion deflagrating flames using a dynamic flame surface density model
Authors: Ibrahim, Salah S.
Gubba, Sreenivasa Rao
Masri, Assaad R.
Malalasekera, W.
Keywords: Explosion modelling
LES
Deflagrating flames
Flame surface density
Issue Date: 2009
Publisher: © Elsevier
Citation: IBRAHIM, S.S....et al., 2009. Calculations of explosion deflagrating flames using a dynamic flame surface density model. Journal of Loss Prevention in the Process Industries, 22(3), pp. 258-264
Abstract: Explosion deflagrating flames in a small scale vented chamber, with repeated obstacles are simulated using the large eddy simulation (LES) technique for turbulent reacting flows. A novel dynamic flame surface density (DFSD) combustion model, based on the laminar flamelet concept has been used to account for the mean chemical reaction rate. All cases considered here start with a stagnant, stoichiometric propane/air mixture. Three configurations with two baffle plates and a solid square obstacle, at different axial locations from the bottom ignition centre are examined. Numerical calculations of explosion generated pressure histories; flame characteristics such as structure, position, speed and acceleration are validated against published experimental data. Influence of the relative position of baffles plates with respect to the origin of the ignition are examined and discussed. Qualitative comparisons of the computed reaction rate are also made with images of Laser Induced Fluorescence from OH measurements. Good agreement obtained between numerical predictions and experimental measurements confirms the applicability of the newly developed dynamic model to predict the dynamics of explosion deflagrating flames.
Description: This article was published in the journal, Journal of Loss Prevention in the Process Industries [© Elsevier] and the definitive version is available at: http://dx.doi.org/10.1016/j.jlp.2008.05.006
Version: Accepted for publication
DOI: 10.1016/j.jlp.2008.05.006
URI: https://dspace.lboro.ac.uk/2134/5566
ISSN: 0950-4230
Appears in Collections:Published Articles (Mechanical and Manufacturing Engineering)

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