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Calculations of explosion deflagrating flames using a dynamic flame surface density model
journal contribution
posted on 2009-12-02, 16:02 authored by Salah Ibrahim, Sreenivasa Rao Gubba, Assaad R. Masri, Weeratunge MalalasekeraWeeratunge MalalasekeraExplosion 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.
History
School
- Mechanical, Electrical and Manufacturing Engineering
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. 258-264Publisher
© ElsevierVersion
- AM (Accepted Manuscript)
Publication date
2009Notes
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.2008.05.006ISSN
0950-4230Language
- en