Emission imaging and CFD simulation of a coaxial single-element GOX/GCH_4 rocket combustor

摘要

The present study aims to contribute to the understanding of the thermal behavior and mixing processes of GOX/GCH_4 single element shear coaxial injector, to provide sufficient data for the validation of numerical tools. Standard experimental measurements as well as optical diagnostic through emission analysis provide detailed information about the heat flux at the hot inner walls of the combustion chamber and flame structure for a pressure level of 10 and 20 bar with O/F variation between 2.6 and 3.4. A RANS simulation of the combustion and wall heat transfer in the combustor was carried out using a Flamelet model. The numerical results show a satisfying agreement with the experiment and are able to capture the effects of varying O/F on heat flux distribution and OH mass fraction.