Comptes Rendus
no. 1-2
Combustion, flow and spray dynamics for aerospace propulsion
Computations of soot formation in ethylene/air counterflow diffusion flames and its interaction with radiation
[Calcul de la formation des suies sur des flammes de diffusion à contre-courant de éthylène/air]
Ignacio Hernández1  ; Guillaume Lecocq1 ; Damien Poitou1 ; Eléonore Riber1 ; Bénédicte Cuenot1
1 CERFACS, 42, avenue Gaspard-Coriolis, 31057 Toulouse, France
Comptes Rendus. Mécanique, Volume 341 (2013) no. 1-2, pp. 238-246.

Une méthodologie est proposée pour le calcul des niveaux de suies produits dans des flammes laminaires monodimensionnelles. Cette méthode est appliquée à une série de flammes de diffusion à contre-courant éthylène/air, largement référencées et documentées dans la littérature, et calculées avec un mécanisme chimique détaillé (Davis et al., 1999 [1]) et le modèle semi-empirique à deux équations de Leung et Lindstedt (1991) [2]. Le modèle de suie a été corrigé afin dʼobtenir un meilleur accord avec les mesures expérimentales de Hwang et Chung (2001) [3]. Afin de prendre en compte les pertes thermiques radiatives, une deuxième série de simulations couplées gaz/suies/rayonnement de ces flammes à contre-courant a été réalisée. Cette démarche permet dʼévaluer lʼeffet du rayonnement des suies et de la phase gazeuse sur la formation des suies et sur la structure de flamme.

A methodology is presented which allows to predict soot levels produced in simple, one-dimensional laminar flames. The method is applied to the calculation of a set of well documented ethylene/air counterflow diffusion flames, using a detailed chemical mechanism (Davis et al., 1999 [1]) and a semi-empirical, two-equation soot model from Leung and Lindstedt (1991) [2]. Modifications of the original soot model are made in order to retrieve the experimental measurements of Hwang and Chung (2001) [3]. To account for radiative heat losses, a second series of fully coupled gas/soot/radiation simulations of the counterflow flames is performed. This allows to assess the effect of soot and gas radiation on soot formation and on the flame structure.

Publié le :
DOI : 10.1016/j.crme.2012.11.005
Keywords: Soot, Radiation, Counterflow diffusion flames
Mot clés : Suies, Rayonnement, Flammes de diffusion à contre-courant
Ignacio Hernández 1 ; Guillaume Lecocq 1 ; Damien Poitou 1 ; Eléonore Riber 1 ; Bénédicte Cuenot 1

1 CERFACS, 42, avenue Gaspard-Coriolis, 31057 Toulouse, France 
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Ignacio Hernández; Guillaume Lecocq; Damien Poitou; Eléonore Riber; Bénédicte Cuenot. Computations of soot formation in ethylene/air counterflow diffusion flames and its interaction with radiation. Comptes Rendus. Mécanique, Volume 341 (2013) no. 1-2, pp. 238-246. doi : 10.1016/j.crme.2012.11.005. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2012.11.005/

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