Analysis of methane-air edge flame structure

Habib N. Najm; Mauro Valorani; Dimitris A. Goussis; Jens Prager

doi:10.1080/13647830.2010.483021

Analysis of methane-air edge flame structure

Habib N. Najm, Mauro Valorani, Dimitris A. Goussis, Jens Prager

Mechanical & Nuclear Engineering

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58 Scopus citations

Abstract

We study the structure of a methane-air edge flame stabilized against an incoming mixing layer. The flame is computed using detailed chemical kinetics, and the analysis is based on computational singular perturbation theory.We focus on examination of the dynamical fast/slow structure of the flame, exploring the distribution of time-scales, the composition of the related specific modes and the effective low-dimensional structure. We also study the importance of chemical/transport processes for both major species and radicals in the flame, analyzing the information available from slow/fast importance indices as compared to reaction flux analysis. Results provide enhanced understanding of the flame, outlining the role of different chemical and transport processes in its observed structure.

Original language	British English
Pages (from-to)	257-294
Number of pages	38
Journal	Combustion Theory and Modelling
Volume	14
Issue number	2
DOIs	https://doi.org/10.1080/13647830.2010.483021
State	Published - Apr 2010

Keywords

Computational singular perturbation
Edge flame
Low-dimensional manifold
Methane-air
Triple flame

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title = "Analysis of methane-air edge flame structure",

abstract = "We study the structure of a methane-air edge flame stabilized against an incoming mixing layer. The flame is computed using detailed chemical kinetics, and the analysis is based on computational singular perturbation theory.We focus on examination of the dynamical fast/slow structure of the flame, exploring the distribution of time-scales, the composition of the related specific modes and the effective low-dimensional structure. We also study the importance of chemical/transport processes for both major species and radicals in the flame, analyzing the information available from slow/fast importance indices as compared to reaction flux analysis. Results provide enhanced understanding of the flame, outlining the role of different chemical and transport processes in its observed structure.",

keywords = "Computational singular perturbation, Edge flame, Low-dimensional manifold, Methane-air, Triple flame",

author = "Najm, {Habib N.} and Mauro Valorani and Goussis, {Dimitris A.} and Jens Prager",

note = "Funding Information: This work was supported by the US Department of Energy (DOE), Office of Basic Energy Sciences (BES) Division of Chemical Sciences, Geosciences, and Biosciences. Sandia National Laboratories is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under contract DE-AC04-94-AL85000. M. Valorani acknowledges the support of the Italian Ministry of University and Research (MIUR).",

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AU - Najm, Habib N.

AU - Valorani, Mauro

AU - Goussis, Dimitris A.

AU - Prager, Jens

N1 - Funding Information: This work was supported by the US Department of Energy (DOE), Office of Basic Energy Sciences (BES) Division of Chemical Sciences, Geosciences, and Biosciences. Sandia National Laboratories is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under contract DE-AC04-94-AL85000. M. Valorani acknowledges the support of the Italian Ministry of University and Research (MIUR).

PY - 2010/4

Y1 - 2010/4

N2 - We study the structure of a methane-air edge flame stabilized against an incoming mixing layer. The flame is computed using detailed chemical kinetics, and the analysis is based on computational singular perturbation theory.We focus on examination of the dynamical fast/slow structure of the flame, exploring the distribution of time-scales, the composition of the related specific modes and the effective low-dimensional structure. We also study the importance of chemical/transport processes for both major species and radicals in the flame, analyzing the information available from slow/fast importance indices as compared to reaction flux analysis. Results provide enhanced understanding of the flame, outlining the role of different chemical and transport processes in its observed structure.

AB - We study the structure of a methane-air edge flame stabilized against an incoming mixing layer. The flame is computed using detailed chemical kinetics, and the analysis is based on computational singular perturbation theory.We focus on examination of the dynamical fast/slow structure of the flame, exploring the distribution of time-scales, the composition of the related specific modes and the effective low-dimensional structure. We also study the importance of chemical/transport processes for both major species and radicals in the flame, analyzing the information available from slow/fast importance indices as compared to reaction flux analysis. Results provide enhanced understanding of the flame, outlining the role of different chemical and transport processes in its observed structure.

KW - Computational singular perturbation

KW - Edge flame

KW - Low-dimensional manifold

KW - Methane-air

KW - Triple flame

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DO - 10.1080/13647830.2010.483021

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SN - 1364-7830

VL - 14

SP - 257

EP - 294

JO - Combustion Theory and Modelling

JF - Combustion Theory and Modelling

IS - 2

ER -

Analysis of methane-air edge flame structure

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Keywords

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