Hydrodynamics of Concurrent Downflow Fast Fluidization (Ⅱ)

祁春鸣; 金涌; 俞芷青; 白丁荣; 钟孝湘

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Hydrodynamics of Concurrent Downflow Fast Fluidization (Ⅱ)

更新时间：2025-12-16

- Hydrodynamics of Concurrent Downflow Fast Fluidization (Ⅱ)
- CIESC Journal Issue 3, (1990)
- 作者机构：
  
  清华大学化工系联合应化工程研究所一部,清华大学化工系联合应化工程研究所一部,清华大学化工系联合应化工程研究所一部,清华大学化工系联合应化工程研究所一部,中国石化总公司石油化工科学研究院 ,北京,北京,北京,北京,北京
- 作者简介：
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- DOI：
  CLC：
- Online First：25 June 1990，
  
  Published：25 June 1990
- 稿件说明：
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祁春鸣, 金涌, 俞芷青, et al. Hydrodynamics of Concurrent Downflow Fast Fluidization (Ⅱ)[J]. CIESC Journal, 1990, (3).
DOI：

祁春鸣, 金涌, 俞芷青, et al. Hydrodynamics of Concurrent Downflow Fast Fluidization (Ⅱ)[J]. CIESC Journal, 1990, (3). DOI：

摘要

对气—固两相流动的流体力学分析

建立了下行快速流化床气—固流动行为的数学模型.对四种颗粒在不同操作条件下的床层压力及压力梯度的实验测定

回归得到了模型参数C_d的关联式:C_d=AK·C_dAK=(l+2.78/m)×14.1/Fr由模型及C_d关联式

预测了描述气固并流向下运动的诸物理量

并与实测值比较

表明该模型可以较好地反映气—固并流向下运动的流体力学规律.

Abstract

A mathematical model of gas-solids flow behavior of a concurrent down-flow fast fluidization bed was established on the basis of hydrodynamics study. Experimental data of bed pressure and pressure gradient under different operating conditions of four kinds of particles were correlated to give an equation of model parameter Cd: where AK=(1 + 2.78/m) × 14.1/Fr The physical quantities characterizing concurrent gas-solids downflow were predicted with the model and C correlation and compared with measured ones. The model was found effective in describing the hydrodynamics of concurrent gas-solids downflow.

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