Abstract

An improved data analysis approach has been developed for the combined laser extinction and two-angle elastic light scattering diagnostics to relate the various measured optical cross sections to soot aggregate properties. The performance of the proposed approach is assessed using the comprehensive dataset of Santoro ethylene–air co-flow diffusion flame. Compared to previously reported studies, the proposed approach can be applied to a wider range of soot sources by removing the assumption made to the scattering regime or moment ratio of aggregate size distribution. The proposed approach also considers the contribution of scattering to extinction in determining the soot volume fraction, and this contribution is shown to increase as soot aggregate size becomes larger. The sensitivity of the calculation to the assumed parameters of the approach is examined and discussed. The mean radius of gyration of soot aggregates and the ratio of scattering intensities at the two measurement angles are shown to be independent of soot refractive index and are therefore recommended for soot model validation purposes.

© 2016 Optical Society of America

Full Article  |  PDF Article
More Like This
Determination of soot parameters by a two-angle scattering–extinction technique in an ethylene diffusion flame

Silvana De Iuliis, Francesco Cignoli, Sergio Benecchi, and Giorgio Zizak
Appl. Opt. 37(33) 7865-7874 (1998)

Light scattering and absorption by fractal-like carbonaceous chain aggregates: comparison of theories and experiment

Rajan K. Chakrabarty, Hans Moosmüller, W. Patrick Arnott, Mark A. Garro, Jay G. Slowik, Eben S. Cross, Jeong-Ho Han, Paul Davidovits, Timothy B. Onasch, and Douglas R. Worsnop
Appl. Opt. 46(28) 6990-7006 (2007)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (14)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription