Characterization of the injectors near-field region of LRE combustion chambers

The injectors near-field region of LRE combustion chambers is numerically investigated by means of both multi and single-injector combustor simulations. An efficient and validated uRANS numerical framework based on non-adiabatic flamelets is used to describe methane-oxygen turbulent nonpremixed combustion. Two paradigmatic configurations, representing the flame-wall and flame-flame interactions occurring on an injection plate are used to develop a 2D axy-symetric dataset. On both configurations, the confinement length of the injector is parametrically varied in order to isolate its effect on the heat flux insisting on the injector face-plate. Finally the results are compared to a fully 3D case, consisting in 37 injectors characterized by the same operating conditions and parameters as the 2D cases.