Abstract
Measurements of the profiles of gas composition and temperature and temperature are made in C2H2−O2−Ar and C2H2−NO2−Ar laminar premixed flames at a pressure of 25 torr. The composition of stable species is measured by probe sampling and mass spectrometric gas analysis, the composition of unstable species is measured by linear laser-induced fluorescence, and the temperature is measured by thermocouples on the burner surface and OH rotational spectra at positions above the burner. Measured flame structure is compared with flame modeling in order to develop a reaction mechanism for the C2H2−NO2−Ar flame. The comparison of the measured and experimental profiles for the two flames is good. Results for the O2 flame support an existing mechanism for C2H2 oxidation. The results for the previously unstudied NO2 flame support a reaction mechanism based on C2H2−O2 flame modeling, H2−NO2 flame modeling and H−C−N species interactions.
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