A three-equation model for the prediction of soot emissions in LES of gas turbines

The design of new low-emission systems requires the development of models providing an accurate prediction of soot production for a small computational cost. In this work, a three-equation model is developed based on mono-disperse closure of the source terms from a sectional method. In addition, a p...

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Bibliographic Details
Published inProceedings of the Combustion Institute Vol. 37; no. 4; pp. 5411 - 5419
Main Authors Franzelli, B., Vié, A., Darabiha, N.
Format Journal Article
LanguageEnglish
Published Elsevier Inc 01.01.2019
Elsevier
Subjects
Engineering Sciences
Gas turbine
Particle size distribution
Reactive fluid environment
Soot modeling
Three-equation model
Soot modeling
Particle size distribution
Gas turbine
Three-equation model
Soot modelling
three-equation model
Particle Size Distribution
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Summary:The design of new low-emission systems requires the development of models providing an accurate prediction of soot production for a small computational cost. In this work, a three-equation model is developed based on mono-disperse closure of the source terms from a sectional method. In addition, a post-processing technique to estimate the particles size distribution (PSD) from global quantities is proposed by combining Pareto and log-normal distributions. After validation, the developed strategy is used to perform a large eddy simulation of soot production in a model combustor representative of gas turbine combustion chambers. It is shown that the three-equation model is able to provide a good estimation of soot volume fraction and information on PSD in complex geometries for a low computational time.
ISSN:1540-7489
1873-2704
1540-7489
DOI:10.1016/j.proci.2018.05.061