抄録
Ammonia is regarded as one of the possible alternative fuels for industrial furnaces because of its high transportability and storability. In the industrial furnaces, it is important to understand the radiative characteristics of flame. However, the knowledge of the radiative characteristics of ammonia flame is extremely limited. In this study, the radiative heat flux and the radiation spectra from the ammonia flame were measured to understand the radiative characteristics of ammonia flame. A slot burner was used for stabilizing the laminar ammonia/N_2/O_2 premixed flame. The concentration of O_2 in the oxidizer and equivalence ratio were varied for increasing the flame temperature. The results showed that radiative heat flux of ammonia was lower than that of methane/air premixed flame in all condition of that has the same net heating values per unit time. Ammonia/N_2/O_2 premixed flame doesn't have any intensity in the spectra band of CO_2 absorption. In addition, oxygen-enriched ammonia/N_2/O_2 premixed flame showed higher intensity than that of methane/air premixed flame in the spectra band of H_2O at around 2.7 μm band.
