Soot Characterization with Laser-Induced Incandescence Applied to a Laminar Premixed Ethylene-Air Flame

TitleSoot Characterization with Laser-Induced Incandescence Applied to a Laminar Premixed Ethylene-Air Flame
Publication TypeJournal Article
Year of Publication2010
AuthorsHadef, R, Geigle, KP, Meier, W, Aigner, M
Journal TitleInternational Journal of Thermal Sciences
Volume49
Pages1457-1467
KeywordsMcKenna
Abstract

Laser-induced incandescence (LII) has emerged as a promising non-invasive technique for measuringspatially and temporally resolved soot volume fraction and size. In this investigation we try to assess itsperformance in more detail by characterizing primary particle sizes using time-resolved LII and sootvolume fractions by 2D LII. The experiments were performed at a fixed location in premixed ethylene/airflames burning on a sintered stainless-steel plug (McKenna) burner with varying values of the equivalenceratio for primary particle sizing and on the burner axis for concentration measurements. Maximumsoot concentrations follow a power law behavior with equivalence ratio. The primary particle sizesobtained from LII decay curves are in good agreement with the values measured by other techniques andshow a clear rise of particle size with equivalence ratio. The data analyzed with the help of a validated LIImodel will be useful for the further development of soot formation models.

URLhttp://dx.doi.org/10.1016/j.ijthermalsci.2010.02.014
DOI10.1016/j.ijthermalsci.2010.02.014