THE METHOD OF DETERMINING THE MEAN SIZE, CONCENTRATION AND REFRACTIVE-INDEX OF PARTICLES IN HIGH-TEMPERATURE FLOWS

A method, based on measurements of the dependence of extinction on the angular aperture of a photodetector, is proposed for use in determini ng the parameters of particles in high-temperature flows. The method e nables one to determine the concentration and mean size of the dispers e phase and to simultaneously recover the refractive index of low-abso rbing particles. The conditions of correct recovery of the size and re fractive index of particles are treated. Successful evaluation tests a re performed of the method of measuring monodisperse latexes in water and polydisperse particles of diverse materials in flows of the produc ts of propane combustion in air.