Quantitative determination of combustion intermediates with cavity ring-down spectroscopy: systematic study in propene flames near the soot-formation limit

摘要

Cavity ring-down spectroscopy (CRDS) was applied in several fuel-rich, one-dimensional, premixed C_(3)H_(6)/O_(2)/Ar flames at 50 mbars (37.5 torr) to measure absolute OH, HCO, and ~(1)CH_(2) concentration as well as temperature as a function of stoichiometry. Although these flames near the sooting limit present a complex chemical environment, significant spectral interferences were found to be absent. Specific aspects of the CRDS technique for measurement of temperature and radical concentration profiles are discussed; and the results are analyzed in comparison with flame model simulations.