Numerical Study of Turbulent Structures for Lean Premixed Prevaporized Combustion
F. Bouras
UniversitГ© de HL-BATNA, AlgГ©rie
Keywords: turbulent combustion, probability density function, large-eddy simulation, lean premixed prevaporized combustion, computational fluid dynamics
Abstract
In this paper we demonstrate the advantages of the LES-WALE model coupled with the PDF approach to resolve a set of aerothermochemistry equations for turbulent lean premixed prevaporized combustion. The main issue is the modeling of the closure in the turbulent combustion equations. So, combustion problems involve a strong coupling between dynamic and scalar parameters. The validation is based on comparisons of three parameters: mean longitudinal velocity, fluctuation of longitudinal velocity, and length of recirculation zones. In line with what was observed by an experimental reference study, the simulation succeeds to detect the flame zone and to model the flow morphology for different equivalence ratios and inlet mass flow rates.
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