Time-resolved emission spectroscopy in acetylene-oxygen explosions

A comparison of emission spectra between 2100 and 6500 Å from low-pressure diffusion flames and explosions of acetylene and oxygen showed only small differences in relative concentrations of the excited species. The time dependence of the free-radical emission during explosions indicated that OH( A...

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Bibliographic Details
Published in:Combustion and flame 1970-01, Vol.14 (1), p.61-66
Main Authors: Oldman, R.J., Norris, W.B., Broida, H.P.
Format: Article
Language:English
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Summary:A comparison of emission spectra between 2100 and 6500 Å from low-pressure diffusion flames and explosions of acetylene and oxygen showed only small differences in relative concentrations of the excited species. The time dependence of the free-radical emission during explosions indicated that OH( A 2Σ) was formed first, followed by CH( A 2Δ and B 2Σ), and finally by C 2(A 3Π). During explosions, the peak intensity was as much as 100 times greater than that observed from steady flames. In addition to the usual emission, the forbidden CO Cameron bands ( a 3Π - X 1Σ) were detected.
ISSN:0010-2180
1556-2921
DOI:10.1016/S0010-2180(70)80010-4