ENERGY-MINIMIZATION MULTI-SCALECORE-ANNULUS (EMMS/CA) MODELFOR GAS-SOLID CIRCULATING FLUIDIZED BEDS

CHENG Congli; GAO Shiqiu; ZHANG Zhongdong

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ENERGY-MINIMIZATION MULTI-SCALECORE-ANNULUS (EMMS/CA) MODELFOR GAS-SOLID CIRCULATING FLUIDIZED BEDS

更新时间：2025-12-10

- ENERGY-MINIMIZATION MULTI-SCALECORE-ANNULUS (EMMS/CA) MODELFOR GAS-SOLID CIRCULATING FLUIDIZED BEDS
- CIESC Journal Issue 8, (2002)
- 作者机构：
  
  中国科学院过程工程研究所多相反应开放研究实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 August 2002，
  
  Published：25 August 2002
- 稿件说明：
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CHENG Congli, GAO Shiqiu, ZHANG Zhongdong. ENERGY-MINIMIZATION MULTI-SCALECORE-ANNULUS (EMMS/CA) MODELFOR GAS-SOLID CIRCULATING FLUIDIZED BEDS[J]. CIESC Journal, 2002, (8).
DOI：

CHENG Congli, GAO Shiqiu, ZHANG Zhongdong. ENERGY-MINIMIZATION MULTI-SCALECORE-ANNULUS (EMMS/CA) MODELFOR GAS-SOLID CIRCULATING FLUIDIZED BEDS[J]. CIESC Journal, 2002, (8). DOI：

摘要

通过对核区和环区分别建立相应的流体速度表达式改进了能量最小多尺度 (EMMS)径向流动模型

使模拟计算结果更趋合理 .将EMMS模型和环核 (CA)模型结合起来

建立了能量最小多尺度环核 (EMMS/CA)模型

通过EMMS模型的解可以使求解困难的CA模型得到封闭解 .运用该模型可以计算气固循环流化床中空隙率、流体速度、颗粒速度、滑移速度等动力学参数的二维分布 .模型计算值与文献报道的实验值符合较好

Abstract

A modified energy-minimization multi-scale (EMMS) model is proposed th rough establishing different corresponding expressions for calculating radial pr ofiles of gas velocity in core and annulus.The calculating results of the modifi ed model are more reasonable than the previous model compared with the experimental results.A new model

called energy-minimization multi-scale core-annulus (EMMS/CA) model

is developed by combination of the EMMS and CA model s.The equation of CA model can be solved via the solution of EMMS model.Two-dime nsional distributions of dynamic parameters in gas-solid circulating fluidized b ed

including voidage

fluid velocity

particle velocity

slip velocity and so on

can be calculated with the use of the present model.Comparisons with experime ntal data from literature confirmed the validity of the model.

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