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Large-Eddy Simulation of atomization in evaporating and reactive conditions

ED MEGEP – [Subject to defense authorization]

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Numerical simulation of fluid flows plays a crucial role in the development of new aeronautical technologies, the certification of engines, and the evaluation of their efficiency. Fuel is stored in liquid form before being injected into the combustion chamber. In aeronautical engines, the fuel undergoes an atomization process that fragments the dense liquid into a spray of droplets. This phenomenon governs the distribution of vaporized fuel, directly influencing the quality of combustion. In addition to atomization, the combustion chamber is the site of complex phenomena such as evaporation, mixing, and combustion, which play a critical role in pollutant production. Turbulent combustion, as it occurs in aeronautical combustors, and its coupling with atomization and evaporation remain poorly understood. The aeronautical industry increasingly relies on numerical tools to gain deeper insights into these phenomena. Models capable of accurately reproducing this intricate physics need to be developed. Although scientific communities specializing in two-phase flows and turbulent combustion have advanced significantly, a unified method to address these phenomena in a unified framework is still lacking. The objective of this doctoral work is to employ, and develop a method capable of modeling liquid-gas flows, as well as evaporation and combustion phenomena, in a robust, simple, and computationally efficient manner. This approach, referred to as the multi-fluid method, will be used to study the atomization, and the combustion phenomena in environments reminiscent of those encountered in aeronautical combustion chambers, focusing on both academic and industrial configurations.

Jury

M. François-Xavier Demoulin	Université de Rouen	Reviewer
M. Olivier Le Métayer	Université Aix-Marseille	Reviewer
Mme Marica Pelanti	ENSTA Paris	Examiner
M. Marc Massot	École Polytechnique	Examiner
M. Pierre Boivin	Université Aix-Marseille	Co-PhD supervisor
M. Nicolas Odier	Cerfacs	PhD supervisor