Flamelet mathematical models for non-premixed laminar combustion

Journal Article · Sun Feb 15 00:00:00 EST 2009 · Combustion and Flame

DOI:https://doi.org/10.1016/J.COMBUSTFLAME.2008.07.011· OSTI ID:21137919

Carbonell, D; Perez-Segarra, C D; Oliva, A ^[1]; Coelho, P J ^[2]

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1. Centre Tecnologic de Transferencia de Calor (CTTC), Universitat Politecnica de Catalunya (UPC), Colom 11, E-08222 Terrassa, Barcelona (Spain)
2. Mechanical Engineering Department, Instituto Superior Tecnico, Universidade Tecnica de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa (Portugal)

Detailed numerical calculations based on the solution of the full transport equations have been compared with flamelet calculations in order to analyse the flamelet concept for laminar diffusion flames. The goal of this work is to study the interactive (Lagrangian Flamelet Model and Interactive Steady Flamelet Model), and non-interactive (Steady Flamelet Model and Enthalpy Defect Flamelet Model) flamelet models considering both differential diffusion and non-differential diffusion situations, and adiabatic and non-adiabatic conditions. Moreover, a new procedure has been employed to obtain enthalpy defects in the flamelet library, the application of which has been found to be encouraging. The effect of using in-situ, local or stoichiometric scalar dissipation rate conditions, and also the effect of using local or stoichiometric conditions to evaluate the flamelet-like time has been analysed. To improve slow species predictions using the non-interactive models, their transport equations are solved with the reaction terms calculated from the flamelet library, also considering local or stoichiometric conditions in the so-called Extended Flamelet Models. (author)

• OSTI ID: 21137919
• Journal Information: Combustion and Flame, Vol. 156, Issue 2; Other Information: Elsevier Ltd. All rights reserved; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COMBUSTION
TRANSPORT THEORY
DIFFUSION EQUATIONS
STOICHIOMETRY
LAGRANGIAN FUNCTION
MATHEMATICAL MODELS
LAMINAR FLAMES
MATHEMATICAL SOLUTIONS
FORECASTING
SCALARS
ENTHALPY
Laminar non-premixed flames
Interactive flamelets
Non-interactive flamelets
Enthalpy defect
Extended flamelets