We used a two-angle scattering technique to investigate the soot distribution in an ethylene diffusion flame in conjunction with extinction measurements. In the framework of a fractal description, we introduced a modified structure factor to interpret the scattering intensity from polydisperse aggregates. The connection between a mean value of a structural radius of gyration, Rgm1, and the quantities experimentally measured was then established. Soot parameters (volume fraction, particle size, and number densities) were determined along three radial sections of a 8-cm high-diffusion flame. The stability of the results with respect to the parameters of the distribution function was studied.
© 1998 Optical Society of America
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements
(280.2470) Remote sensing and sensors : Flames
Silvana De Iuliis, Francesco Cignoli, Sergio Benecchi, and Giorgio Zizak, "Determination of Soot Parameters by a Two-Angle Scattering–Extinction Technique in an Ethylene Diffusion Flame," Appl. Opt. 37, 7865-7874 (1998)