C2 Swan band laser-induced fluorescence and chemiluminescence in low-pressure hydrocarbon flames

Laser-induced fluorescence from the excitation of the C2(d-a) 2,0 band at 438 nm is used to determine spatial profiles and relative lower state concentrations in several low-pressure hydrocarbon–air premixed flames, to determine the fuel-rich flame kinetics. Quenching loss rate constants are derived from the measured fluorescence decay rates. Quantitative Swan band chemiluminescence intensities, coupled with computer modeling of the flame kinetics and excited state loss rates, lead to recommended values of rate constants for the excited C2(d)-state chemiluminescence production kinetics.