Multi-region thermal characterization in LRE combustion chambers

This contribution tackles the thermal characterization problem of a Liquid Rocket Engine combustion chamber under high-pressure operating conditions. The development of an efficient multi-region, multi-physics numerical framework for turbulent combustion and heat transfer modeling is discussed, together with its application on single and multi-injector test cases. The solver features a flamelet-based approach for non-adiabatic, non-equilibrium, non-premixed turbulent combustion, and a consistent Conjugate Heat Transfer description to guarantee the thermal balance across the interfaces between neighbouring continua. The coupling procedure is in particular optimized for convection-dominated phenomena, allowing for the simulation of long time-windows at reasonably limited computational costs.