关键词: 射流, 流化床, 多相流体力学, 计算机模拟

Abstract: The governing equations of multiphase hydrodynamics for describing dense gas-solid two-phase flow in a jet fluidized bed with conical gas distributors were provided. The numerical simulations were based on two-dimensional (2-D) general orthogonal grid. The numerical meshes were obtained by solving two Laplace equations iteratively. The improved IPSA algorithm was employed to solve the governing equations on the generated numerical meshes. A general-purpose CFD computer for 2-D simulations was developed. The post-processing was performed using Tecplot. For a typical case, the computed results were consistent with the experimental measurements. The angle of conical gas distributor, nozzle diameter, bed height, aperture distribution of holes in gas distributor, jet velocity and superficial gas velocity in bed were varied in the numerical simulation to study the flow patterns, the jet penetration heights and the solid particle circulation.

Key words: jet, fluidized bed, multiphase hydrodynamics, computer simulation