Analysis of Voidage Fluctuations in Gas-Solid Bubbling Fluidized Bed Based on Kolmogorov Entropy

Feng HAN; Kunlin CONG; Jie XIANG; Qinghai LI; Yanguo ZHANG; Jing MA

doi:10.12096/j.2096-4528.pgt.20041

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Analysis of Voidage Fluctuations in Gas-Solid Bubbling Fluidized Bed Based on Kolmogorov Entropy

Power Generation and Enviromental Protection | 更新时间：2025-07-04

- Analysis of Voidage Fluctuations in Gas-Solid Bubbling Fluidized Bed Based on Kolmogorov Entropy
- Power Generation Technology Vol. 42, Issue 3, Pages: 322-328(2021)
- 作者机构：
  
  1.北京热华能源科技有限公司, 北京市海淀区 100085
  2.清华大学能源与动力工程系, 北京市海淀区 100084
  3.润电能源科学技术有限公司, 河南省郑州市 450000
- 作者简介：
- 基金信息：
  
  National Key Research and Development Program of China(2017YFB0603901);Huaneng Group Science and Technology Research Project HNKJ20-H50(U20YYJC09)
- DOI：10.12096/j.2096-4528.pgt.20041
  CLC： TK16
- Received：13 May 2020，
  
  Published：30 June 2021
- 稿件说明：
移动端阅览
Feng HAN, Kunlin CONG, Jie XIANG, et al. Analysis of Voidage Fluctuations in Gas-Solid Bubbling Fluidized Bed Based on Kolmogorov Entropy[J]. Power Generation Technology, 2021, 42(3): 322-328.
DOI：

Feng HAN, Kunlin CONG, Jie XIANG, et al. Analysis of Voidage Fluctuations in Gas-Solid Bubbling Fluidized Bed Based on Kolmogorov Entropy[J]. Power Generation Technology, 2021, 42(3): 322-328. DOI： 10.12096/j.2096-4528.pgt.20041.

摘要

气固流动状态决定了流化床中气固两相的混合、传热和传质特性，对流化床装置的设计、运行和监测起着重要作用。在实验室内搭建的冷态气固鼓泡流化床上，采用颗粒浓度测量仪测量了不同工况条件下流化床床中心的空隙率波动信号，通过混沌分析的方法分析气固鼓泡床中空隙率时间序列的Kolmogorov熵及其分布特征，研究表观气速、静床高度和床体尺寸对Kolmogorov熵的影响规律。研究结果表明：表观气速对Kolmogorov熵的影响最大，静床高度次之，床体尺寸最小。

Abstract

The gas-solid flow state determines the gas-solid mixing

heat and mass transfer characteristics in the fluidized bed

and plays an important role in the design

operation and monitoring of the fluidized bed device. In a self-built cold gas-solid bubbling fluidized bed

voidage fluctuation signals were measured using the particle concentration measuring instrument at the center of the fluidized bed under different working conditions

and were analyzed by chaotic theory using Kolmogorov entropy. The influences of apparent gas velocity

static bed height and bed size were studied. It shows the apparent gas velocity has the largest influence on Kolmogorov entropy

followed by the static bed height

and the smallest is bed size.

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references

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