Influence of Preferential Diffusion on the Dynamics of Laminar Bidimensional Premixed Hydrogen Flames
In session: WED 9.2 - Combustion II
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The need for decarbonization of the energetic and transport sectors requires shifting to non-conventional clean technologies which provide high efficiencies, situation that has boosted the research of hydrogen combustion as a competitive option. However, many aspects related to its modelling have still to be elucidated. In particular, the need for considering preferential diffusion effects, which has been traditionally treated with constant non-unity Lewis numbers, should be addressed in order to determine in which conditions unity Lewis number is not acceptable and quantify the differences. In this work, an analysis of the steady regime as well as the dynamic response to velocity fluctuations is carried out with unity Lewis number and mixture averaged model for a laminar bidimensional premixed hydrogen flame.