| ANALYSIS OF THE CHAOTIC DYNAMICS OF A HIGH-FLUX CFB RISER USING SOLIDS CONCENTRATION MEASUREMENTS |
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| 作者姓名： | S. V. Manyele J.-X. Zhu R. E. Khayat J. H. Parssinen |
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| 作者单位： | [1]Department of Chemical and Biochemical Engineering University of Western Ontario London ON N6A 5B9 Canada [2]Department of Mechanical and Materials Engineering, University of Western Ontario, London, ON, N6A 5B9, Canada |
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| 基金项目： | Acknowledgement The authors are grateful to the Natural Sciences and Engineering Research Council of Canada （NSERC） for the financial support to the work presented in this paper. S.V. Manyele would also like to thank the Norwegian Agency for Development Cooperation （N0RAD） through the University of Dares Salaam and the International Graduate Students Scholarship （IGSS） for partially funding his studies at the University of Western 0ntario. |
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| 摘 要： | A high-flux circulating fluidized bed （CFB） riser （0.076-m I.D. and 10-m high） was operated in a wide range of operating conditions to study its chaotic dynamics, using FCC catalyst particles （dp= 67μm, ρp = 1500 kg·m^-3）. Local solids concentration fluctuations measured using a reflective-type fiber optic probe were processed to determine chaotic invariants （Kolmogorov entropy and correlation dimension）, Radial and axial profiles of the chaotic invariants at different operating conditions show that the core region exhibits higher values of the chaotic invariants than the wall region. Both invariants vary strongly with local mean solids concentration. The transition section of the riser exhibits more complex dynamics while the bottom and top sections exhibit a more uniform macroscopic and less-complex microscopic flow structure. Increasing gas velocity leads to more complex and less predictable solids concentration fluctuations, while increasing solids flux generally lowers complexity and increases predictability. Very high solids flux, however, was observed to increase the entropy.
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| 关 键 词： | 高通量提升 集中光纤光探头 混沌分析 混沌动力学 浓度富集测量 |
| 收稿时间： | 2005-12-20 |
| 修稿时间： | 2005-12-202006-04-12 |
ANALYSIS OF THE CHAOTIC DYNAMICS OF A HIGH-FLUX CFB RISER USING SOLIDS CONCENTRATION MEASUREMENTS |
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| S. V. Manyele J.-X. Zhu R. E. Khayat J. H. Parssinen.ANALYSIS OF THE CHAOTIC DYNAMICS OF A HIGH-FLUX CFB RISER USING SOLIDS CONCENTRATION MEASUREMENTS[J].China Particuology,2006,4(3):136-146. |
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| Authors: | S V Manyele J-X Zhu R E Khayat JHPrssinen |
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| Institution: | S. V. Manyele,J.-X. Zhu,R. E. Khayat,J.H.P(a)rssinen |
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| Abstract: | |
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| Keywords: | high-flux riser concentration fiber optic probe chaos analysis correlation dimension Kolmogorov en-tropy |
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