Numerical study of flame stability, stabilization and noise in a swirl-stabilized combustor under choked conditions

Abstract : 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. Is 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.
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Contributor : Corentin Lapeyre <>
Submitted on : Monday, October 17, 2016 - 9:59:12 AM
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Corentin Lapeyre. Numerical study of flame stability, stabilization and noise in a swirl-stabilized combustor under choked conditions. Reactive fluid environment. Institut National Polytechnique de Toulouse (INP Toulouse), 2015. English. ⟨tel-01382449⟩

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