Abstract
A study of the formation and destruction of NO in adiabatic laminar premixed flames of C2H4 + O2 + N2, C2H6 + O2 + N2, and C3H8 + O2 + N2 doped with NO (100 ppm in N2) in a range of equivalence ratios at atmospheric pressure is presented. The heat flux method was employed to measure adiabatic burning velocities of these flames. Nitric oxide concentrations in the post flame zone at 10, 15, and 20 mm above the burner surface were measured using probe sampling. Burning velocities and NO concentrations simulated using a previously developed chemical kinetic mechanism were compared with the experimental results. The conversion ratio of NO seeded into the flames was determined. The kinetic mechanism accurately predicts burning velocities over the entire range of equivalence ratios. Significant discrepancies between the measured and calculated NO conversion in the flames were observed and discussed.
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