Direct Numerical Simulations of imploding & expanding flames. Effects of steam dilution, turbulence and Lewis number

Eric Albin (1) , Christian Olivier Paschereit (2) , Yves d'Angelo (3)

1 CETHIL - Centre de Thermique de Lyon
2 Chair of Fluid Dynamics, Technische Universität Berlin
3 CORIA - Complexe de recherche interprofessionnel en aérothermochimie

A set of 20 three-dimensional Direct Numerical Simulations is computed and analysed. Imploding and expanding spherical flames of steam-methane-hydrogen-air mixtures are simulated using a single step chemistry whose coe cients are set using complex chemistry. Both turbulent and laminar cases are performed. The total flame surface and internal volume of gases are extracted from these simulations. The mean consumption speed and flame speed are determined for laminar and turbulent flames. A particular attention is given to describe the e ffect of high steam content, turbulence and fuels on flame speeds and flame topologies.

Domaines: Thermique [physics.class-ph]; Thermique [physics.class-ph]

Eric Albin, Christian Olivier Paschereit, Yves d'Angelo. Direct Numerical Simulations of imploding & expanding flames. Effects of steam dilution, turbulence and Lewis number. 8th Mediterranean Combustion Symposium - MCS-13, Sep 2013, Çesme, İzmir, Turkey. ⟨hal-00954543⟩