Multi-angle light scattering for investigating soot particle/aggregate parameters in a counterflow flame at elevated pressures

Hafiz M.F. Amin*, William L. Roberts

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations

Abstract

In this work, different morphological parameters of soot are investigated using multi-angle light scattering and extinction, at elevated pressures. N2-diluted ethylene/air counterflow diffusion flames are stabilized inside the pressure vessel at pressures up to 5 atm. The pressure vessel can provide optical access for multi-angle light scattering from 10 to 170 degrees. An Ar/Kr ion laser beam emitted at 514.5 nm wavelength is focused at the center of the flame and light scattered by soot particles is measured, at several angles between 25° to 165°, by light collection optics that are mounted on a rotary stage. A global strain rate of 30s-1 is maintained for all pressures by adjusting the inlet flow. The scattering measurements are analyzed using Rayleigh-Debye-Gans theory for polydisperse fractal aggregates and scattering to absorption ratio, soot volume fraction, mean particle diameter and aggregate size distribution are calculated through the 1-D flame as a function of pressure.

Original languageEnglish (US)
StatePublished - Jan 1 2017
Event10th U.S. National Combustion Meeting - College Park, United States
Duration: Apr 23 2017Apr 26 2017

Conference

Conference10th U.S. National Combustion Meeting
CountryUnited States
CityCollege Park
Period04/23/1704/26/17

Keywords

  • Aggregate size
  • Counterflow
  • Light scattering
  • Primary particle diameter

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Multi-angle light scattering for investigating soot particle/aggregate parameters in a counterflow flame at elevated pressures'. Together they form a unique fingerprint.

Cite this