Thermal characterization in LRE: a parametric analysis on injector arrangement

The injector layout influence on a gaseous-methane/gaseous-oxygen (GCH4/GOX) flame emanating from a single shear coaxial Liquid Rocket Engine (LRE) injector is presented. More specifically, in this contribution we investigate the flame-flame interaction, by collecting a database of two-dimensional axis-symmetric simulations, modeled with a symmetry boundary condition to represent the presence of a neighbouring identical injector. The geometrical feature varied as parameter is the lateral confinement, representative of the mutual distance between adjacent injectors. The differences between such a flame and a flame bounded by an isothermal wall, on equal geometry and injection conditions, is also presented. The numerical framework chosen for the high-pressure, turbulent, non-premixed flame description is based on a unsteady Reynolds-Averaged Navier Stokes (uRANS) approach, coupled to a flamelet model accounting for non-equilibrium and non-adiabatic effects.