Numerical Simulation of Reacting and Non-Reacting Flow in Solid Fuel Scramjet Engine Combustor

In this study,computational analysis was carried out to study the reacting flow filed of solid-fuel scramjet combustor. Two-dimensional, axisymmetric combustion geometry was considered for the analysis. The turbulent (k-Ɛ) model andtwo-step eddy dissipation reaction model wereused for modelling the combustion reactions. The paraffin wax was used as a solid fuel. The non-reacting and reacting flow simulation were carried out using ANSYS FLUENT software at inlet airflow of Mach number 2. The non-reacting flow analysis showedthe formation of expansion and shocks waves inthe flow. The fluctuations inflow velocities wereascribed to the formation of the shock waves. Theseshocks were the main reason for rising the pressure and temperature inside the combustor. The study of reacting flow revealed that the shock train observed due to interaction of the flow with flame and formation of combustionby-products. The high concentrations of combustion products at the wall also suggested that the reaction takes place in the vicinity of the wall.