Origin of pressure fluctuations in fluidized beds

被引：31

作者：

Puncochár, M ^{[1
]}

Drahos, J ^{[1
]}

机构：

[1] Acad Sci Czech Republ, Inst Chem Proc Fundamentals, Dept React Engn Gas Phase, CZ-16502 Prague 6, Czech Republic

来源：

CHEMICAL ENGINEERING SCIENCE | 2005年 / 60卷 / 05期

关键词：

fluidization; pressure fluctuations; bubbles;

D O I：

10.1016/j.ces.2004.09.054

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The present paper shows a novel approach in interpreting the standard deviation of pressure fluctuations in a fluidized bed with respect to the spectral analysis. Based on several realistic assumptions for a freely bubbling bed, the physical model was proposed for the standard deviation of incoherent part of pressure fluctuations. Using the concept of energy dissipated in a fluidized bed the plausible explanation of linear dependence of standard deviation calculated from the total pressure signal on the excess gas velocity was given and verified experimentally. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：1193 / 1197

页数：5

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