Abstract
Pure oxygen combustion has been attempted with using a rapidly-mixed type tubular flame burner. Instead of nitrogen in the previous study, carbon dioxide was used as a diluent and combustion characteristics were investigated as functions the oxygen concentration in the oxygen/carbon dioxide mixtures. Results show that stable combustion can be obtained in wider equivalence-ratio range for carbon dioxide than for nitrogen. Less burning velocities in carbon dioxide mixtures than in nitrogen mixtures seem to be attributed for their wider stable combustion range. Burning velocity control is important to get stable pure oxygen combustion.
