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A dynamic SGS model for LES of turbulent premixed flames
conference contribution
posted on 2010-03-26, 09:41 authored by Sreenivasa Rao Gubba, Salah Ibrahim, Weeratunge MalalasekeraWeeratunge MalalasekeraNumerical simulations are carried out for transient turbulent premixed flames using
large eddy simulations (LES) technique. The sub-grid scale (SGS) mean chemical reaction rate is
calculated using a simple algebraic relation for flame surface density (FSD), with a dynamic
formulation for the model coefficient. The dynamic model is derived based on fractal theory and a
flame wrinkling factor and implemented in compressible LES code. The developed model is used to
simulate turbulent premixed flames of stoichiometric propane/air mixture in a vented combustion
chamber, propagating over built-in solid obstacles. The fractal dimension is dynamically calculated
by viewing the flame front as a fractal surface, using the SGS velocity fluctuations and the strained
laminar burning velocity. The model predictions are validated against experimental measurements
where good agreements are obtained.
History
School
- Mechanical, Electrical and Manufacturing Engineering
Citation
GUBBA, S.R., IBRAHIM, S.S. and MALALASEKERA, W., 2008. A dynamic SGS model for LES of turbulent premixed flames. IN: Proceedings of CHT-08 ICHMT International Symposium on Advances in Computational Heat Transfer, Marrakesh, Morocco, May 11th-16th.Publisher
© Begell HouseVersion
- NA (Not Applicable or Unknown)
Publication date
2008Notes
This article is closed access. The conference proceedings are available from Begell House: http://www.begellhouse.com/references/1bb331655c289a0a,7b3a3e4b261b8fb8,6adfcecc57a7f57c.htmlISBN
9619139305Language
- en