Gas-particle mixture flow in various types of convergent-divergent nozzle

Abstract

The velocity and behavior of crowded particles in the flow of gas-particle mixture as related to the shape of a convergent-divergent nozzle were investigated. Calculated values of the velocity of particles accelerated with various types of nozzle were compared with the experimental results measured by the double-flash photographic method. It was found that the calculations and experiments were in good agreement within the error of experimental measurement. On the other hand, by using the dimensional analysis method, the velocity of particles or the specific kinetic energy of particles was expressed as the function of the following parameters: particle size, particle density, nozzle geometry, and operating conditions for gas flow. It was also made clear that the velocity and behavior of particles through the nozzle strongly depend upon the mixing ratio and the nozzle geometry, particularly the geometry of inlet and throat. © 1978, The Society of Chemical Engineers, Japan. All rights reserved.