Turbulent Two-Phase Combustion Modeling
Francois Lacas(Laboratoire EM2C, Ecole Centrale de Paris)
Thursday November 5, 14.00 p.m. CERFACS Conference Room
Abstract :
The purpose of this work is to contribute to the understanding and modelling of the phenomena taking place in spray combustion. For that a computer code handling small scale simulation of near droplets field was developped. Liquid/gas interface is resolved with a Volume of Fluid technique taking into account surface tension, heat transfer, chemical reaction and vaporization effects. This computation code is used to study the vaporization and combustion of a liquid oxygen spray in hot gaseous hydrogen. The effects of spray geometry and relative velocity between the two phases is studied. The role of the vaporization and molecular diffusion in the production and destruction of reactants concentration heterogeneities is clearly shown. Finally, time evolution equations for the mean value and variance of the mixture fraction are established in the case of a vaporizing spray.
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