Analysis of wall temperature and heat flux distributions in a swirled combustor powered by a methane-air and a CO2-diluted oxyflame

摘要: Abstract The behavior of technically premixed CO2-diluted methane oxyflames is compared to operation with methane-air flames in a labscale combustor equipped an axial-plus-tangential swirler. It has been shown former study that the stabilization regimes and topologies oxy-flames can be deduced from despite large changes oxidizer fuel flowrates. This work proceeds focuses on differences distributions wall temperature heat fluxes for oxyflame sharing same thermal power, equivalence ratio, adiabatic flame swirl number. Laser-Induced Phosphorescence measurements are used determine along metallic back plane internal external surfaces quartz windows. These data local flux through found both air feature approximately total loads combustion chamber walls. As high concentrations carbon dioxide known significantly enhance radiative transfer, analysis carried out so as account mechanisms provide this similarity temperatures between two flames. low order model allows determining origin shows how convective transfer supplemented by when switching oxy-combustion global load remains roughly unaltered studied chamber.