Abstract
Ammonia is regarded as one of the alternative fuels. To use ammonia as the alternative fuel, it is necessary to pay attention to Fuel-NOx formation. In this study, the oxygen-enriched combustion was applied to an NH_3/N_2/O_2 premised flame to make the flame stable. The effects of the oxygen-enriched combustion on characteristics of the NOx formation and on the unburned ammonia remained in the burned gas were evaluated. Results showed that the NO concentration reached to 1.4 % in fuel lean conditions. In fuel rich conditions, the NO concentration decreased with increasing the equivalence ratio.
