Soot prediction by Large-Eddy Simulation of complex geometry combustion chambers

Guillaume Lecocq; Ignacio Hernández; Damien Poitou; Eléonore Riber; Bénédicte Cuenot

doi:10.1016/j.crme.2012.10.002

Combustion, flow and spray dynamics for aerospace propulsion

Soot prediction by Large-Eddy Simulation of complex geometry combustion chambers
[Prédiction des suies par simulation aux grandes échelles de chambres de combustion à géométrie complexe]

Guillaume Lecocq ¹ ; Ignacio Hernández ¹ ; Damien Poitou ¹ ; Eléonore Riber ¹ ; Bénédicte Cuenot ¹

¹ CERFACS, CFD Team, 42, avenue G. Coriolis, 31057 Toulouse cedex 01, France

Comptes Rendus. Mécanique, Volume 341 (2013) no. 1-2, pp. 230-237.

Résumé
Abstract

Cet article aborde la modélisation de la production des suies pour des simulations aux grandes échelles (SGE) de géométries complexes. De tels calculs imposent un compromis entre précision et temps de calcul qui limite le choix des modèles de suie aux approches semi-empiriques. La présence dʼacétylène étant une condition nécessaire à la nucléation des particules de suie, le modèle de Leung et al. qui intègre cette caractéristique est choisi et utilisé dans ce travail. Cependant, la concentration dʼacétylène nʼest pas fournie par les chimies réduites utilisées dans les SGE de géométries complexes et une méthodologie a été développée pour prédire cette espèce clé à travers une technique de tabulation. Avec cette méthodologie, le modèle de Leung et al. est tout dʼabord testé et validé à partir de mesures de flammes laminaires prémélangées. Ensuite, la méthode de prédiction des suies est appliquée à la SGE de la chambre de combustion dʼun moteur dʼhélicoptère.

This article is dedicated to the modeling of soot production in Large-Eddy Simulations (LES) of complex geometries. Such computations impose a trade-off between accuracy and CPU cost which limits the choice of soot models to semi-empirical ones. As the presence of acetylene is a necessary condition for soot inception, the Leung et al. model that accounts for this feature is chosen and used in this work. However, acetylene concentration is not provided by the reduced chemistries used in LES of complex geometries and a methodology has been developed to predict this key species through a tabulation technique. With this methodology, the model of Leung et al. is first tested and validated against measured laminar premixed flames. Then, the soot prediction method is applied to the LES of the combustion chamber of a helicopter engine.

Publié le : 2013-01-01

DOI : 10.1016/j.crme.2012.10.002

Keywords: Combustion, Soot modeling, Complex chemistry, Large-Eddy Simulation
Mot clés : Combustion, Modélisation des suies, Chimie complexe, Simulation aux grandes échelles

Affiliations des auteurs :

Guillaume Lecocq ¹ ; Ignacio Hernández ¹ ; Damien Poitou ¹ ; Eléonore Riber ¹ ; Bénédicte Cuenot ¹

¹ CERFACS, CFD Team, 42, avenue G. Coriolis, 31057 Toulouse cedex 01, France

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     author = {Guillaume Lecocq and Ignacio Hern\'andez and Damien Poitou and El\'eonore Riber and B\'en\'edicte Cuenot},
     title = {Soot prediction by {Large-Eddy} {Simulation} of complex geometry combustion chambers},
     journal = {Comptes Rendus. M\'ecanique},
     pages = {230--237},
     publisher = {Elsevier},
     volume = {341},
     number = {1-2},
     year = {2013},
     doi = {10.1016/j.crme.2012.10.002},
     language = {en},
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Guillaume Lecocq; Ignacio Hernández; Damien Poitou; Eléonore Riber; Bénédicte Cuenot. Soot prediction by Large-Eddy Simulation of complex geometry combustion chambers. Comptes Rendus. Mécanique, Volume 341 (2013) no. 1-2, pp. 230-237. doi : 10.1016/j.crme.2012.10.002. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2012.10.002/

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