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Multiphase Flow LES Study of the Fuel Split Effects on Combustion Instabilities in an Ultra Low-NOx Annular Combustor

Bauerheim, Michaël and Jaravel, Thomas and Esclapez, Lucas and Riber, Eleonore and Gicquel, Laurent Y.M. and Cuenot, Bénédicte and Cazalens, Michel and Bourgois, S. and Rullaud, M. Multiphase Flow LES Study of the Fuel Split Effects on Combustion Instabilities in an Ultra Low-NOx Annular Combustor. (2015) Journal of Engineering for Gas Turbines and Power. 1-13. ISSN 0742-4795

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Official URL: http://doi.org/10.1115/GT2015-44139

Abstract

This paper describes the application of a coupled acoustic model/large-eddy simulation approach to assess the effect of fuel split on combustion instabilities in an industrial ultra-low-NO x annular combustor. Multiphase flow LES and an analytical model (analytical tool to analyze and control azimuthal modes in annular chambers (ATACAMAC)) to predict thermoacoustic modes are combined to reveal and compare two mechanisms leading to thermoacoustic instabilities:(1) a gaseous type in the multipoint zone (MPZ) where acoustics generates vortex shedding, which then wrinkle the flame front, and (2) a multiphase flow type in the pilot zone (PZ) where acoustics can modify the liquid fuel transport and the evaporation process leading to gaseous fuel oscillations.

Item Type:Article
HAL Id:hal-02115476
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Centre Européen de Recherche et Formation Avancées en Calcul Scientifique - CERFACS (FRANCE)
Other partners > SAFRAN (FRANCE)
Other partners > Société nationale d'étude et de constructions de moteurs d'avion - SNECMA (FRANCE)
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Deposited On:30 Apr 2019 10:18

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