期刊
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
卷 41, 期 -, 页码 56-67出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijmultiphaseflow.2012.01.001
关键词
Optical probe; Fluidized bed; Bubble size; Bubble rise velocity; Sensitivity study; Bubble linking algorithm
类别
资金
- Verband Schweizerische Gasindustrie (VSG/ASIG)
The objective of this paper is to show and discuss the applicability of optical probes to measure the bubble size and bubble rise velocity in fluidized beds. Therefore, a bubble linking algorithm based on regression techniques is proposed. The algorithm is demonstrated using optical probe signals measured in a lab-scale fluidized bed with Geldart A/B particles, at two probe heights and for four gas velocities. In a sensitivity study, it is shown that results from optical probe measurements are always dependent on the choice of an appropriate set of parameters and constraints in the bubble linking algorithm. Both an increased gas velocity and an elevated probe height lead to larger bubbles and a modified bubble size distribution. Due to slugging and wall effects, the bubble rise velocity does not show a clear trend. (C) 2012 Elsevier Ltd. All rights reserved.
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