Validation of Multi-Physics Coupling Code for Unsteady Reacting Swirling Flow in Solid Fuel Ramjet

This paper presents a validation study of a multiphysics coupling code for solid fuel pyrolysis in solid-fuel ramjet engine (SFRJ). An in-house code has been developed to model flow, turbulence, heat transfer, solid pyrolysis, and chemical reactions. Unsteady reacting simulations are performed for swirling and non-swirling flows in SFRJ with high-density polyethylene solid fuel cylindrical grain. Experiments are carried out with and without swirl through connected pipe test facility. It is found that the code can describe accurately enough the local regression rate in the SFRJ.