SHANNON ENTROPY ANALYSIS OF DYNAMIC BEHAVIOR OF GELDART GROUP B AND GELDART GROUP D PARTICLES IN A FLUIDIZED BED

被引:18
|
作者
Duan, Feng [1 ]
Cong, Shengquan [1 ]
机构
[1] Anhui Univ Technol, Sch Met & Resource, Maanshan 243002, Peoples R China
关键词
Flow pattern; Fluidized bed; Gas-solid; Pressure fluctuation; Shannon entropy; TURBULENT FLUIDIZATION; PRESSURE-FLUCTUATIONS; WAVELET ANALYSIS; FLOW; REGIMES; TRANSITION;
D O I
10.1080/00986445.2012.717317
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Pressure fluctuations resulting from the nonuniform flow behavior of solid particles in a fluidized bed (0.06 m ID x 5.0 m in height) were analyzed using the Shannon entropy analysis method. Particles representing Geldart group B and group D types were employed in the experiments. Results show that with the increase of the superficial gas velocity, transitions between bubbling fluidization, turbulent fluidization, and fast fluidization were effectively detected based on the Shannon entropy of pressure fluctuations in the bed. Meanwhile, a higher static bed height resulted in a larger value of Shannon entropy due to the wall effect of smaller diameter column and the greater resistance to bubble formation affected by the increased weight of the bed. Comparison of the particle types indicated that despite the different details of their behavior, the overall trends were similar.
引用
收藏
页码:575 / 586
页数:12
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