Experimental study of the dynamics of an air-dust jet

Abstract

This paper presents the results of an experimental study of the development of a two-phase jet containing solid particles with initial concentration H₀ ≤ 1.0 kg/kg. The experimental data show that the temperature fields in the jet cross sections in dimensionless coordinates may be correlated by a single universal curve for various sections and various initial concentrations. The effect of solids on the jet boundary layer growth is shown to be greater than expected before. It is found that the increase of the width of the air-dust jet depends not only on the density variation across the mixing zone but also on the effect of the solid particles on the turbulent mixing process. This effect results in slower increase of the width of the jet and, consequently, slower damping of the jet.