Experimental and modeling study of chemical-kinetics mechanisms for H2-NH3-air mixtures in laminar premixed jet flames

► Laminar flame speeds of H2-NH3-air mixtures measured in a jet flame configuration. ► Three detailed chemical mechanisms are compared for H2-NH3-air mixtures. ► Flames speeds well predicted for equivalence ratios from 0.5 to 1.1 and 0-80% NH3. ► Corrections for heat losses necessary to match freely propagating flame speeds. ► Sensitivity analyses reveal significance of OH, H, and O radicals on flame speeds.