Estimation of Wake Model Parameters for a Three-phase Fluidized Bed by Bed Collapse Technique

张俊平; 金涌; 俞芷青

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Estimation of Wake Model Parameters for a Three-phase Fluidized Bed by Bed Collapse Technique

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- Estimation of Wake Model Parameters for a Three-phase Fluidized Bed by Bed Collapse Technique
- CIESC Journal Issue 1, (1992)
- 作者机构：
  
  清华大学化工系,清华大学化工系,清华大学化工系北京100084,北京100084,北京,100084
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 February 1992，
  
  Published：25 February 1992
- 稿件说明：
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张俊平, 金涌, 俞芷青. Estimation of Wake Model Parameters for a Three-phase Fluidized Bed by Bed Collapse Technique[J]. CIESC Journal, 1992, (1).
DOI：

张俊平, 金涌, 俞芷青. Estimation of Wake Model Parameters for a Three-phase Fluidized Bed by Bed Collapse Technique[J]. CIESC Journal, 1992, (1). DOI：

摘要

采用床层塌落技术研究了并流向上三相流化床的流体力学行为

实验测得尾涡模型中的两个重要参数k、x;并与采用传统压差法测得的各相相含率以及利用参数k、x通过尾涡模型预测的各相相含率进行对比时

发现两者吻合良好

证明采用床层塌落技术的研究是成功的.

Abstract

The hydrodynamic behavior of a cocurent gas-liquid-solid fluidized bed was studied by the bed collapse technique

and the key parameters

k and x

of the generalized wake model were estimated. Compared with other existing methods for evaluating the parameters

k and x

the bed collapse technique shows some distinct advantages. The parameters are derived directly from experiments in a three-dimensional three-phase fluidized bed. There is no need to assume a complete sphere for a bubble and its wake. The holdup results of the three-phase fluidized bed predicted by the generalized wake model with the estimated k and x are in good agreement with those obtained with the traditional pressure-drop method.

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