Horizontal Planar Angular Light Scattering (HPALS) characterization of soot produced in a laminar axisymmetric coflow ethylene diffusion flame

Jérôme Yon (1) , José Morán (1) , Florian Lespinasse (1) , Felipe Escudero (2) , Gilles Godard (1) , Marek Mazur (1) , Fengshan Liu (3) , Andrés Fuentes (2)

1 CORIA - Complexe de recherche interprofessionnel en aérothermochimie
2 UTFSM - Universidad Tecnica Federico Santa Maria [Valparaiso]
3 NRC - National Research Council of Canada

In-flame optical characterization of soot is of vital importance to understand soot formation mechanisms as well as to develop and validate accurate soot models. The present work introduces an unconventional methodology adapted to laminar axisymmetric flames that avoids the issue of variable measurement vol- ume with varying scattering angle in the existing light scattering techniques and thus enables the deter- mination of aggregate size with a higher spatial resolution. Coupled with multi-wavelength line-of-sight attenuation measurements, the proposed Horizontal Planar Angular Light Scattering at 532 nm was found able to provide radial profiles of aggregate size, number and diameter of primary spheres, soot volume fraction, and number density in a laminar axisymmetric coflow ethylene/air diffusion flame established over a Gülder burner. The spatial variation of soot optical properties associated with soot maturity was considered in data analysis.

Mots clés: Line-of-sight attenuation; RDGFA; Planar angular light scattering; Axisymmetric flames; Soot maturity

Domaines: Electromagnétisme; Sciences de l'ingénieur [physics]; Milieux fluides et réactifs

Jérôme Yon, José Morán, Florian Lespinasse, Felipe Escudero, Gilles Godard, et al.. Horizontal Planar Angular Light Scattering (HPALS) characterization of soot produced in a laminar axisymmetric coflow ethylene diffusion flame. Combustion and Flame, 2021, 232, pp.111539. ⟨10.1016/j.combustflame.2021.111539⟩. ⟨hal-03265019⟩