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Title: A dynamic SGS model for LES of turbulent premixed flames
Authors: Gubba, Sreenivasa Rao
Ibrahim, Salah S.
Malalasekera, W.
Issue Date: 2008
Publisher: © Begell House
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.
Abstract: Numerical 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.
Description: This article is closed access. The conference proceedings are available from Begell House: http://www.begellhouse.com/references/1bb331655c289a0a,7b3a3e4b261b8fb8,6adfcecc57a7f57c.html
Version: Closed access
URI: https://dspace.lboro.ac.uk/2134/6043
ISBN: 9619139305
Appears in Collections:Closed Access (Mechanical and Manufacturing Engineering)

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