Extensive Measurements on Soot Particles in Laminar Premixed Flames by Quasi Elastic Light Scattering Spectroscopy

Abstract

The data obtained by Quasi-Elastic Light-Scattering Spectroscopy on twenty five alkane-oxygen sooting flames are presented. This optical method, based on the interaction between particles and their surrounding, allows the granulometric study of the soot aerosol evolution accounting for the specific aerosol regime existing in the considered flame. Diffusion Broadening and/or Photon Correlation Spectroscopy adapted to a Brownian aerosol in a flowing high temperature medium are used for the simultaneous measurements of soot diameter and number density or diameter and polydispersity. The data reduction method employed permits easy analysis including the transit time and the polydispersity aspects of the scatterers. Soot coagulation growth rates are also determined for these flames.