Non-intrusive determination of bubble and slug length scales in fluidized beds by decomposition of the power spectral density of pressure time series

被引:204
作者
van der Schaaf, J
Schouten, JC
Johnsson, F
van den Bleek, CM
机构
[1] Eindhoven Univ Technol, Lab Chem Reactor Engn, NL-5600 MB Eindhoven, Netherlands
[2] Delft Univ Technol, JM Burgers Ctr Fluid Mech, Dept Chem Proc Technol, Chem Reactor Engn Sect, NL-2628 BL Delft, Netherlands
[3] Chalmers Univ Technol, Dept Energy Convers, S-41296 Gothenburg, Sweden
关键词
fluidization; bubble size; slug size; pressure; power spectral density; coherence;
D O I
10.1016/S0301-9322(01)00090-8
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
In this paper we show that spectral analysis of non-intrusive time dependent pressure measurements in bubbling and circulating gas-solid fluidized beds permits to obtain the first estimates of bubble, gas slug, and solids cluster length scales from pressure fluctuation data. These length scales are calculated from the incoherent cross power spectra of pressure signals measured in the bubbling or circulating bed and in the plenum. Remarkable quantitative agreement with bubble diameter data is found, and equally remarkable agreement is obtained with independent estimates of gas slug lengths by others in circulating fluidized beds. These results demonstrate the possibility of greatly expanding the information that can be obtained non-intrusively from gas-solid fluidized beds. (C) 2002 Published by Elsevier Science Ltd.
引用
收藏
页码:865 / 880
页数:16
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