Turbulent combustion modelling of a confined premixed jet flame including heat loss effects using tabulated chemistry

•A turbulent combustion model based on the reaction progress variable is presented.•An optimal choice of the reaction progress variable is proposed.•Chemistry tabulation is based on laminar premixed flamelets including heat losses.•The model is suitable for Reynolds-averaged Navier Stokes and large-...

Full description

Saved in:
Bibliographic Details
Published in:Applied energy 2015-10, Vol.156, p.804-815
Main Authors: Gövert, S., Mira, D., Kok, J.B.W., Vázquez, M., Houzeaux, G.
Format: Article
Language:English
Subjects:
Combustion
Combustió
Enginyeria electrònica
LES
Models matemàtics
Premixed ames
Premixed flames
RANS
Tabulated chemistry
Turbulent combustion modelling
Àrees temàtiques de la UPC
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•A turbulent combustion model based on the reaction progress variable is presented.•An optimal choice of the reaction progress variable is proposed.•Chemistry tabulation is based on laminar premixed flamelets including heat losses.•The model is suitable for Reynolds-averaged Navier Stokes and large-eddy simulations.•Good prediction capabilities are found for a turbulent premixed jet flame. The present work addresses the coupling of a flamelet database, to a low-Mach approximation of the Navier–Stokes equations using scalar controlling variables. The model is characterized by the chemistry tabulation based on laminar premixed flamelets in combination with an optimal choice of the reaction progress variable, which is determined based on the computational singular perturbation (CSP) method. The formulation of the model focuses on turbulent premixed flames taking into account the effect of heat losses, but it is easily extended to partially premixed and non-premixed regimes. The model is designed for applications in both, Reynolds-averaged Navier–Stokes (RANS) as well as large-eddy simulations (LES) and results for the two methods are compared. A priori analysis of the database is presented to demonstrate the influence of the reaction progress definition and the chemistry tabulation is validated against a one-dimensional premixed laminar flame. The validation of the turbulent case is performed using a turbulent premixed confined jet flame subject to strong heat losses, in which the model shows a good overall performance.
ISSN:0306-2619
1872-9118
DOI:10.1016/j.apenergy.2015.06.031