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Capturing localised extinction in Sandia Flame F with LES-CMC

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journal contribution
posted on 07.12.2012, 11:09 by Andrew Garmory, E. Mastorakos
A Large Eddy Simulation (LES) using the Conditional Moment Closure (CMC) as a sub-grid turbulence-chemistry model has been applied to piloted jet diffusion flames (Sandia D&F). A 3D CMC grid was used which allowed different CMC boundary conditions to be applied in the jet and pilot streams. The code was found to give very good agreement with experiment in the low extinction case of Flame D. For Flame F transient extinction and re-ignition events were observed with LES–CMC which lead to reductions in averaged unconditional and conditional temperature consistent with experimental observations. Further analysis revealed that the CMC extinction/ignition events were the result of a combination of high conditional scalar dissipation rate and transport in the CMC grid.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Citation

GARMORY, A. and MASTORAKOS, E., 2011. Capturing localised extinction in Sandia Flame F with LES-CMC. Proceedings of the Combustion Institute, 33 (1), pp. 1673 - 1680.

Publisher

© The Combustion Institute. Published by Elsevier Inc.

Version

AM (Accepted Manuscript)

Publication date

2011

Notes

This article was published in the journal, Proceedings of the Combustion Institute [© The Combustion Institute. Published by Elsevier Inc.] and the definitive version is available at: http://dx.doi.org/10.1016/j.proci.2010.06.065

ISSN

1540-7489

Language

en

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