Numerical investigation of hydrodynamic processes in combustion chamber with an intensified fluidized bed

Abstract

Abstract A gas suspension fluidized bed is reviewed, as an intensified fluidized bed, where the principles of classical spouted and fluidized beds are used together. A physical model of the process is presented. The working chamber consists of horizontally arranged sections, with spouted bed of gas suspension in the lower section and fluidized bed here in the upper section. Moreover, the lower section has a geometric shape in the form of a truncated regular pyramid. The basic formulas of mathematical modeling and the results of a numerical investigation of the hydrodynamics of a combustion chamber with an intensified fluidized bed are presented. The resulting mathematical model solved by the fourth-order Runge-Kutta method in the Matlab software environment. The graphs of changes in the velocity of gases and solid particles, pressure loss of a gas suspension depending on the height of the working chamber and the angle between the vertical axis and the side faces of the lower part of the section are obtained. Also obtained graphs characterizing the rise time of solid particles in height and their residence time in sections of the working chamber.