Study on Flame Stability of Ammonia Coaxial-Flow Jet Non-premixed Flame

Abstract

Ammonia is regarded as one of the alternative fuels because CO₂ is not emitted during the combustion process of ammonia. However, ammonia laminar non-premixed flame is difficult to be stable under atmospheric oxidizer (O₂ 21%) of room temperature. Therefore, it is important to know the flammable conditions of ammonia coaxial-flow jet non-premixed flame for developing the industrial furnace. In this study, the flammable conditions of ammonia laminar flame were investigated by changing O₂ volume fraction and rim thickness. Also, effects of fuel velocity and oxidizer velocity on the flame stability of ammonia laminar flame were investigated.