Some Aspects of Seeding Flames with Refractory Oxide Particles

Abstract

An experiment has been conducted to determine the variation in light scattering characteristics of refractory oxide particles (TiO₂ and AI₂O₃) as they pass through a laminar pre-mixed hydrogen-air flame. It was found that AI₂O₃ was not affected by the flame but Ti02 particles exhibited a substantial reduction in scattered light intensities. In addition the effect of agglomeration on particle light scattering measurements of the fluctuating concentration field in a turbulent flame was evaluated with the use of Mie scattering computations. The broadness of the initial particle size distribution was found 1o be a dominant parameter. Measurements using nearly monodisperse aerosols were most sensitive to agglomeration