Des Simulations aux Grandes Échelles dʼun brûleur expérimental swirlé sont réalisées au moyen de deux codes, lʼun compressible et lʼautre bas Mach. Les simulations sont obtenues utilisant les deux codes pour évaluer leur performance et déduire une stratégie potentielle de modélisation. Les champs moyens de vitesse sont comparés aux résultats expérimentaux. La suite de cet article sʼoriente sur la détermination des pertes de charge au travers du système dʼinjection, fortement dépendantes de paramètres tels que la résolution du maillage, le traitement des parois et le code. Deux approches numériques sont disponibles, soit le choix de résoudre entièrement lʼécoulement, soit dʼutiliser une loi de paroi. Les résultats montrent que pour des écoulements à nombres de Reynolds élevés, la loi de paroi fournit de meilleures prédictions en réduisant lʼerreur par rapport aux résultats expérimentaux avec un coût global de calcul raisonnable.
Large-Eddy Simulations (LES) of a swirl experimental burner are performed using a compressible and a low Mach number solver. The investigations are focused on the modeling strategies in LES aimed at validating the flow predictions and principally the associated pressure losses. Accurate prediction of pressure drop through complex geometries, such as those typically encountered in industrial swirlers, is indeed of paramount importance to design and optimize the engine efficiency. LES is here probed and tested to identify the model parameters affecting pressure losses: grid resolution, wall treatment or solver accuracy, with the aim of highlighting the requirements for accurate pressure drop predictions. Results show that for the high Reynolds number flow considered, the wall law model provides the best predictions and minimizes the error compared to experimental findings with a reasonable overall CPU cost.
Mots clés : Simulation aux Grandes Échelles, Traitement des parois, Perte de charge
@article{CRMECA_2013__341_1-2_277_0,
author = {David Barr\'e and Matthias Kraushaar and Gabriel Staffelbach and Vincent Moureau and Laurent Y.M. Gicquel},
title = {Compressible and low {Mach} number {LES} of a swirl experimental burner},
journal = {Comptes Rendus. M\'ecanique},
pages = {277--287},
publisher = {Elsevier},
volume = {341},
number = {1-2},
year = {2013},
doi = {10.1016/j.crme.2012.11.010},
language = {en},
}
TY - JOUR AU - David Barré AU - Matthias Kraushaar AU - Gabriel Staffelbach AU - Vincent Moureau AU - Laurent Y.M. Gicquel TI - Compressible and low Mach number LES of a swirl experimental burner JO - Comptes Rendus. Mécanique PY - 2013 SP - 277 EP - 287 VL - 341 IS - 1-2 PB - Elsevier DO - 10.1016/j.crme.2012.11.010 LA - en ID - CRMECA_2013__341_1-2_277_0 ER -
%0 Journal Article %A David Barré %A Matthias Kraushaar %A Gabriel Staffelbach %A Vincent Moureau %A Laurent Y.M. Gicquel %T Compressible and low Mach number LES of a swirl experimental burner %J Comptes Rendus. Mécanique %D 2013 %P 277-287 %V 341 %N 1-2 %I Elsevier %R 10.1016/j.crme.2012.11.010 %G en %F CRMECA_2013__341_1-2_277_0
David Barré; Matthias Kraushaar; Gabriel Staffelbach; Vincent Moureau; Laurent Y.M. Gicquel. Compressible and low Mach number LES of a swirl experimental burner. Comptes Rendus. Mécanique, Volume 341 (2013) no. 1-2, pp. 277-287. doi : 10.1016/j.crme.2012.11.010. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2012.11.010/
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