Angle-Dependent Light Scattering Measurements of Silica Aggregates in a Stoichiometric Methane/Hexamethydisiloxane/Air Premixed Flames

摘要

Angle-dependent light scattering (ADLS) measurements have been used in the past to study various fractal structures produced in flames such as soot, titania, and silica. These measurements provide an unobtrusive way to measure the size of fractal aggregates via the calculation of the fractal dimension (D_f) and radius of gyration (R_g) without the use of transmission electron microscopy (TEM). In this study, angle-dependent light scattering was performed on a stoichiometric one-dimensional methane/hexamethyldisiloxane/air premixed flames. Fractal aggregate growth was studied as a function of flame height at various silicon concentrations. The average radius of gyration for aggregates at a specific height above the burner was determined using the Guinier analysis method.