In continuous-flow combustors burning atomized liquid fuels, inhomogeneities exist withinthe flow due to imperfect fuel-air mixing. These fuel-air ratio nonuniformities affect the formation of NO, both from the nitrogen in the air and from elemental nitrogen contained in the fuel. Experiments to demonstrate these effects have been carried out in a cylindrical atmospheric-pressure burner fueled with kerosene and kerosene doped with pyridine. Mixing and kinetic models are developed to explain how the measured concentrations of NO formed via the Zel'dovich mechanism and from fuel nitrogen vary with mean fuel-air ratio and initial degree of mixedness. © 1973 Combustion Institute.
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