LES of a swirled pressurized ethylene air flame with Lagrangian soot tracking (CEDRE)

Numerical simulation of the FIRST (Fuel Injector Research for Sustainable Transport) configuration, experimentally investigated at DLR, with the ONERA CEDRE code. The numerical simulation is performed by coupling the CEDRE/CHARME fluid mechanics solver and CEDRE/SPARTE Lagrangian dispersed phase solver. The flame - identified on the left by an isosurface of heat release (orange) - is stabilized by an inner recirculation zone. Soot particles are produced in the lower part of the chamber and oxidized in the upper part, partly through secondary air injection - identified on the left by an isosurface of oxygen mass fraction (blue) - which reproduces the behavior of RQL (Rich burn, Quick-mix, Lean burn) aeronautical combustors. Experimental and numerical time-averaged fields of the soot volume fraction (in ppm) are compared on the right and show a good agreement.