Direct numerical simulations of premixed turbulent flames with reduced chemistry: Validation and flamelet analysis

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27 Citations (Scopus)

Abstract

Direct numerical simulation is a very powerful tool to evaluate the validity of new models and theories for turbulent combustion. In this paper, direct numerical simulations of spherically expanding premixed turbulent flames in the thin reaction zone regime and in the broken reaction zone regime are performed. The flamelet-generated manifold method is used in order to deal with detailed reaction kinetics. The computational results are analyzed by using an extended flame stretch theory. It is investigated whether this theory is able to describe the influence of flame stretch and curvature on the local burning velocity of the flame. It is found that if the full profiles of flame stretch and curvature through the flame front are included in the theory, the local mass burning rate is well predicted. The influence of several approximations, which are used in other existing theories, is studied. When flame stretch is assumed constant through the flame front or when curvature of the flame front is neglected, the theory fails to predict the local mass burning rate. The influence of using a reduced chemistry model is investigated by comparing flamelet simulations with reduced and detailed chemistry.
LanguageEnglish
Pages67-85
JournalFlow, Turbulence and Combustion
Volume75
Issue number1-4
DOIs
StatePublished - 2005

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turbulent flames
premixed flames
Direct numerical simulation
direct numerical simulation
flames
chemistry
flame propagation
burning rate
curvature
turbulent combustion
Reaction kinetics
reaction kinetics
profiles
approximation
simulation

Cite this

@article{bb4ec60bc06a45c9834a72637bf4639a,
title = "Direct numerical simulations of premixed turbulent flames with reduced chemistry: Validation and flamelet analysis",
abstract = "Direct numerical simulation is a very powerful tool to evaluate the validity of new models and theories for turbulent combustion. In this paper, direct numerical simulations of spherically expanding premixed turbulent flames in the thin reaction zone regime and in the broken reaction zone regime are performed. The flamelet-generated manifold method is used in order to deal with detailed reaction kinetics. The computational results are analyzed by using an extended flame stretch theory. It is investigated whether this theory is able to describe the influence of flame stretch and curvature on the local burning velocity of the flame. It is found that if the full profiles of flame stretch and curvature through the flame front are included in the theory, the local mass burning rate is well predicted. The influence of several approximations, which are used in other existing theories, is studied. When flame stretch is assumed constant through the flame front or when curvature of the flame front is neglected, the theory fails to predict the local mass burning rate. The influence of using a reduced chemistry model is investigated by comparing flamelet simulations with reduced and detailed chemistry.",
author = "{Oijen, van}, J.A. and R.J.M. Bastiaans and G.R.A. Groot and {Goey, de}, L.P.H.",
year = "2005",
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pages = "67--85",
journal = "Flow, Turbulence and Combustion",
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}

Direct numerical simulations of premixed turbulent flames with reduced chemistry: Validation and flamelet analysis. / Oijen, van, J.A.; Bastiaans, R.J.M.; Groot, G.R.A.; Goey, de, L.P.H.

In: Flow, Turbulence and Combustion, Vol. 75, No. 1-4, 2005, p. 67-85.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Direct numerical simulations of premixed turbulent flames with reduced chemistry: Validation and flamelet analysis

AU - Oijen, van,J.A.

AU - Bastiaans,R.J.M.

AU - Groot,G.R.A.

AU - Goey, de,L.P.H.

PY - 2005

Y1 - 2005

N2 - Direct numerical simulation is a very powerful tool to evaluate the validity of new models and theories for turbulent combustion. In this paper, direct numerical simulations of spherically expanding premixed turbulent flames in the thin reaction zone regime and in the broken reaction zone regime are performed. The flamelet-generated manifold method is used in order to deal with detailed reaction kinetics. The computational results are analyzed by using an extended flame stretch theory. It is investigated whether this theory is able to describe the influence of flame stretch and curvature on the local burning velocity of the flame. It is found that if the full profiles of flame stretch and curvature through the flame front are included in the theory, the local mass burning rate is well predicted. The influence of several approximations, which are used in other existing theories, is studied. When flame stretch is assumed constant through the flame front or when curvature of the flame front is neglected, the theory fails to predict the local mass burning rate. The influence of using a reduced chemistry model is investigated by comparing flamelet simulations with reduced and detailed chemistry.

AB - Direct numerical simulation is a very powerful tool to evaluate the validity of new models and theories for turbulent combustion. In this paper, direct numerical simulations of spherically expanding premixed turbulent flames in the thin reaction zone regime and in the broken reaction zone regime are performed. The flamelet-generated manifold method is used in order to deal with detailed reaction kinetics. The computational results are analyzed by using an extended flame stretch theory. It is investigated whether this theory is able to describe the influence of flame stretch and curvature on the local burning velocity of the flame. It is found that if the full profiles of flame stretch and curvature through the flame front are included in the theory, the local mass burning rate is well predicted. The influence of several approximations, which are used in other existing theories, is studied. When flame stretch is assumed constant through the flame front or when curvature of the flame front is neglected, the theory fails to predict the local mass burning rate. The influence of using a reduced chemistry model is investigated by comparing flamelet simulations with reduced and detailed chemistry.

U2 - 10.1007/s10494-005-8592-3

DO - 10.1007/s10494-005-8592-3

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JO - Flow, Turbulence and Combustion

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JF - Flow, Turbulence and Combustion

SN - 1386-6184

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