Characterization of dynamic behavior of a spout-fluid bed with Shannon entropy analysis

被引：69

作者：

Zhong, WQ ^{[1
]}

Zhang, MY ^{[1
]}

机构：

[1] Southeast Univ, Key Lab Clean Coal Power Generat & Combust Techno, Minist Educ, Thermoenergy Engn Res Inst, Nanjing 210096, Peoples R China

来源：

POWDER TECHNOLOGY | 2005年 / 159卷 / 03期

基金：

中国国家自然科学基金;

关键词：

multiphase flow; spout-fluid bed; Shannon entropy; flow regime transition;

D O I：

10.1016/j.powtec.2005.08.002

中图分类号：

TQ [化学工业];

学科分类号：

0817 [化学工程与技术];

摘要：

Differential pressure fluctuation time series were obtained at different locations in a two-dimensional spout-fluid bed with a cross section of 300 x 30 min and height 2000 mm. Shannon entropy analysis of differential pressure fluctuations was developed to characterize the dynamic behavior. Effects of two important operating parameters (spouting gas velocity and fluidizing gas flow rate) on the Shannon entropy were examined. It was demonstrated that a spout-fluid bed at a high spouting gas velocity or fluidizing gas flow rate was a deterministic chaos system since the Shannon entropies at all bed locations increased sharply and asymmetric unstable flows occurred. Shannon entropies were found to be significantly different at various bed locations. Shannon entropies of different flow regimes were distinct, so they were used to identify the flow regimes. The results show that the Shannon entropy helps to grasp the complex characteristics of dynamic behavior in spout-fluid beds. (c) 2005 Elsevier B.V All rights reserved.

引用

页码：121 / 126

页数：6

共 32 条

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PROPAGATION OF PRESSURE WAVES AND FORCED-OSCILLATIONS IN GAS-SOLID FLUIDIZED-BEDS AND THEIR INFLUENCE ON DIAGNOSTICS OF LOCAL HYDRODYNAMICS [J].