PhD Defense: Corentin LAPEYRE – Numerical study of flame stability, stabilization and noise in a swirl-stabilized combustor under choked conditions
Civil air traffic increase requires to decrease future aircraft emissions. Aeronautic engine combustor technology has evolved towards Lean Prevaporized Premixed combustion to increase efficiency and reduce noxious emissions. Unfortunately, this technology tends to reduce engine robustness, with a decrease in flame stability and stabilization margins, and an increase in combustion noise.
Compressible Large Eddy Simulation (LES), a promising numerical approach to describe full combustors, is used in this Ph.D on an academic test rig of a typical modern combustor flame in confined conditions. This investigation gives insight on the effects of full system dynamics on combustion instabilities, flame flashback and combustion noise. It shows how these tools can yield understanding of the phenomena controlling flame stability and stabilization, which is essential in order to operate future engines safely.
Luc VERVISCH CORIA – INSA de Rouen Referee
Fabien HALTER ICARE – Université d'Orléans Referee
Sébastien DUCRUIX EM2C- Ecole Centrale de Paris Member
Carlo SCALO Purdue University Member
Stephane MOREAU Université de Sherbrooke Member
Laurent GICQUEL CERFACS Member
Thierry POINSOT IMF Toulouse Advisor
Franck NICOUD Université de Montpellier II Advisor