Combination of LII and extinction measurements for determination of soot volume fraction and estimation of soot maturity in non-premixed laminar flames

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DOIResolve DOI: http://doi.org/10.1007/s00340-015-6092-2
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TypeArticle
Journal titleApplied Physics B: Lasers and Optics
ISSN0946-2171
1432-0649
Volume119
Issue4
Pages685696
AbstractThe measurement of soot and soot precursors is important for understanding the formation of soot particles in flames. In this paper, we use the difference between laserinduced incandescence (LII) and two-dimensional extinction measurements to assess the contribution of soot precursors to the extinction measurement. LII measurements are performed with a high spatial resolution of 100 μm to determine the soot volume fraction (fV) in a laminar ethylene/ air non-premixed flame at the standard Gülder conditions. While LII is specific to mature soot only, the extinction data represent attenuation due to mature and young soot (absorption and elastic scattering) and also absorption by soot precursors. The difference between the two measurements indicates the contribution of soot precursors and allows a determination of the maturity of soot. This is important knowledge for those using extinction techniques to measure soot concentration, as the contribution from soot precursors may lead to an overestimation of the mature soot concentration. Further, regions with high soot-precursor concentrations, which lead to soot formation, can be identified.
Publication date
PublisherSpringer Verlag
LanguageEnglish
AffiliationMeasurement Science and Standards; National Research Council Canada
Peer reviewedYes
NPARC number23000343
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Record identifier0e56df08-d9a3-4b9c-b67d-ad14eb5bc77e
Record created2016-07-08
Record modified2016-07-08
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