Large Eddy Simulations of complex multicomponent swirling spray flames in a realistic gas turbine combustor - HAL Accéder directement au contenu
Article dans une revue Proceedings of the Combustion Institute Année : 2023

Large Eddy Simulations of complex multicomponent swirling spray flames in a realistic gas turbine combustor

Résumé

Large Eddy Simulations of the realistic liquid fueled gas turbine combustor LOTAR operated at ONERA are performed for two fuels; a conventional JetA-1 and an alternative alcohol to jet fuel At-J, each modeled by a 3component formulation. JetA-1 is composed of n-dodecane, methyl-cyclohexane and xylene each corresponding to the major hydrocarbon families found in real fuel. At-J is a synthetic drop in fuel composed of only branched chain alkanes, iso-octane, iso-dodecane and iso-hexadecane. Analytically reduced chemistry and multicomponent spray evaporation model coupled to the dynamic thickened flame turbulent combustion model are employed to understand the processes involved in turbulent spray flames in the LOTAR configuration. The objectives are to predict and understand the potential effects of staged vapourisation and consumption of the fuel components, and their impact on the spray flame structures. Simulations confirm the role of preferential evaporation in establishing and stabilising the reaction zone. JetA-1 evaporation zones extend deep into the rich burnt gasses resulting in a combustion regime with the possibility of droplet clusters burning individually. At-J which is more volatile, leads to complete combustion with the majority occurring due to the premixed lean reactions of the smaller pyrolysed components. The need to further include models capable of identifying and handling combustion regimes encountered in such spray flames is hence highlighted. This work is intended as a starting point for improving multicomponent spray modelling and requires additional experimental data for validation.
Fichier principal
Vignette du fichier
DMPE22150.1684939261_postprint.pdf ( 3.87 Mo ) Télécharger
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-04105312, version 1 (24-05-2023)

Identifiants

Citer

Varun Shastry, Eleonore Riber, Laurent Gicquel, Bénédicte Cuenot, Virginel Bodoc. Large Eddy Simulations of complex multicomponent swirling spray flames in a realistic gas turbine combustor. Proceedings of the Combustion Institute, In press, ⟨10.1016/j.proci.2022.08.059⟩. ⟨hal-04105312⟩

Collections

ONERA GENCI
10 Consultations
25 Téléchargements
Dernière date de mise à jour le 26/06/2024
comment ces indicateurs sont-ils produits

Altmetric

Partager

Gmail Facebook Twitter LinkedIn Plus