Abstract
Measurements of fluorescence and scattering in small-scale, 0 (10 cm diameter), buoyant diffusion flames indicate that absorption of visible laser radiation by gaseous molecules or radicals is negligible compared to absorption and scattering by carbon particulates, Previous experiments determined soot volume fractions and particulate-size distributions in similar polystyrene and polymethylmethacrylate flames by attributing visible laser extinction measurements entirely to carbon particles. Those results are, therefore, not affected by the error in neglecting gas-species absorption. The fluorescence spectra presented here are similar to diffusion flame results in the literature.
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