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LES/CMC Simulations of Swirl-Stabilised Ethanol Spray Flames Approaching Blow-Off

Large Eddy Simulations (LES) with the Conditional Moment Closure (CMC) combustion model of swirling ethanol spray flames have been performed in conditions close to blow-off for which a wide database of experimental measurements is available for both flame and spray characterization. The solution of...

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Autores principales: Giusti, Andrea, Kotzagianni, Maria, Mastorakos, Epaminondas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Netherlands 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6109956/
https://www.ncbi.nlm.nih.gov/pubmed/30174545
http://dx.doi.org/10.1007/s10494-016-9762-1
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author Giusti, Andrea
Kotzagianni, Maria
Mastorakos, Epaminondas
author_facet Giusti, Andrea
Kotzagianni, Maria
Mastorakos, Epaminondas
author_sort Giusti, Andrea
collection PubMed
description Large Eddy Simulations (LES) with the Conditional Moment Closure (CMC) combustion model of swirling ethanol spray flames have been performed in conditions close to blow-off for which a wide database of experimental measurements is available for both flame and spray characterization. The solution of CMC equations exploits a three-dimensional unstructured code with a first order closure for chemical source terms. It is shown that LES/CMC is able to properly capture the flame structure at different conditions and agrees reasonably well with the measurements both in terms of mean flame shape and dynamic behaviour of the flame evaluated in terms of local extinctions and statistics of the lift-off height. Experimental measurements of the overall (liquid plus gaseous) mixture fraction, performed using the Laser-Induced Breakdown Spectroscopy technique, are also included allowing further assessment and validation of the numerical method. The sensitivity of the simulation results to the various boundary conditions is discussed.
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spelling pubmed-61099562018-08-31 LES/CMC Simulations of Swirl-Stabilised Ethanol Spray Flames Approaching Blow-Off Giusti, Andrea Kotzagianni, Maria Mastorakos, Epaminondas Flow Turbul Combust Article Large Eddy Simulations (LES) with the Conditional Moment Closure (CMC) combustion model of swirling ethanol spray flames have been performed in conditions close to blow-off for which a wide database of experimental measurements is available for both flame and spray characterization. The solution of CMC equations exploits a three-dimensional unstructured code with a first order closure for chemical source terms. It is shown that LES/CMC is able to properly capture the flame structure at different conditions and agrees reasonably well with the measurements both in terms of mean flame shape and dynamic behaviour of the flame evaluated in terms of local extinctions and statistics of the lift-off height. Experimental measurements of the overall (liquid plus gaseous) mixture fraction, performed using the Laser-Induced Breakdown Spectroscopy technique, are also included allowing further assessment and validation of the numerical method. The sensitivity of the simulation results to the various boundary conditions is discussed. Springer Netherlands 2016-11-09 2016 /pmc/articles/PMC6109956/ /pubmed/30174545 http://dx.doi.org/10.1007/s10494-016-9762-1 Text en © The Author(s) 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Article
Giusti, Andrea
Kotzagianni, Maria
Mastorakos, Epaminondas
LES/CMC Simulations of Swirl-Stabilised Ethanol Spray Flames Approaching Blow-Off
title LES/CMC Simulations of Swirl-Stabilised Ethanol Spray Flames Approaching Blow-Off
title_full LES/CMC Simulations of Swirl-Stabilised Ethanol Spray Flames Approaching Blow-Off
title_fullStr LES/CMC Simulations of Swirl-Stabilised Ethanol Spray Flames Approaching Blow-Off
title_full_unstemmed LES/CMC Simulations of Swirl-Stabilised Ethanol Spray Flames Approaching Blow-Off
title_short LES/CMC Simulations of Swirl-Stabilised Ethanol Spray Flames Approaching Blow-Off
title_sort les/cmc simulations of swirl-stabilised ethanol spray flames approaching blow-off
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6109956/
https://www.ncbi.nlm.nih.gov/pubmed/30174545
http://dx.doi.org/10.1007/s10494-016-9762-1
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