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Author Thomsen, M.C.; Fuentes, A.; Demarco, R.; Volkwein, C.; Consalvi, J.L.; Reszka, P.
Title Soot measurements in candle flames Type
Year 2017 Publication Experimental Thermal And Fluid Science Abbreviated Journal Exp. Therm. Fluid Sci.
Volume 82 Issue Pages 116-123
Keywords MAE; Modulated Absorption/Emission; Soot volume fraction; Soot temperature; Wick effects
Abstract Soot volume fractions and soot temperatures have been measured for the first time on candle flames. Measurements on laminar steady flames were carried out using candles with wick diameters of 2, 3 and 4 mm. Wick length was varied between 4 and 10 mm. The shape of the candle flame was obtained from CH* spontaneous emissions. Measured flame heights show an increase with wick dimensions, approaching an asymptotic value for increasing wick lengths. Soot volume fractions were obtained from laser extinction measurements with the Modulated Absorption/Emission (MAE) technique. A deconvolution technique and a regularization procedure were applied to the data. Radial profiles of soot volume fractions increase when varying the wick dimensions; this effect is produced by the greater amount of fuel released by the wick. Radially integrated soot volume fractions were also calculated, presenting a similar behavior to the soot volume fraction radial profiles. The peak integrated soot volume fraction was found at approximately half the flame height, independent of the wick dimensions and burning rates. Soot temperature was obtained from emission measurements at two different wavelengths considering the attenuation of the soot particles in the optical path length. A deconvolution and regularization procedure was carried out in order to obtain temperature profiles for different heights in the flame. The observed increase in soot production and soot temperature profiles was directly related to the higher burning rate experienced by the candle. The results show that peak integrated soot volume fractions are proportional to both the mass loss rates and the flame heights. (C) 2016 Elsevier Inc. All rights reserved.
Address [Thomsen, M. C.] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA, Email: pedro.reszka@uai.cl
Corporate Author Thesis
Publisher Elsevier Science Inc Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0894-1777 ISBN Medium
Area Expedition Conference
Notes WOS:000392769400012 Approved
Call Number UAI @ eduardo.moreno @ Serial 696
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