Investigation of gas-solids flow characteristics in a circulating fluidized bed with annular combustion chamber by pressure measurements and CPFD simulation
文献类型：期刊论文
| 作者 | Qiu, Guizhi1,2; Ye, Jiamin1; Wang, Haigang1 |
| 刊名 | CHEMICAL ENGINEERING SCIENCE
 |
| 出版日期 | 2015-09-29 |
| 卷号 | 134页码:433-447 |
| 关键词 | Circulating fluidized bed Flow regimes Pressure CPFD simulation Non-uniformity Power spectrum |
| 英文摘要 | For large scale circulating fluidized bed (CFB) boilers, a new type of annular combustion chamber was proposed to improve the secondary air penetration and provide adequate space to arrange the heat transfer surface. To investigate the gas-solids flow characteristics and optimize the structure of the annular combustion chamber, a "cold" test rig was built with a cross sectional area of 1.18 m(2) and a height of 8.0 m. High frequency pressure transducers were used to obtain the pressure fluctuations characteristics. CFD simulation based on computational particle fluid dynamic (CPFD) was used to obtain pressure fluctuations and particles concentration. The time domain analysis, power spectrum analysis and Hilbert-Huang transform were applied to the experimental and simulation data. Different flow regimes including single bubble regime, exploding bubble regime and turbulent fluidization regime were identified. The flow characteristics were investigated in terms of standard deviation and higher-order moments, auto-correlation, power spectrum, and EMD energy entropy. The results show that the gas-solids flow in the bottom region of the annular combustion chamber was relatively uniform. The gas-solids flow in annular combustion chamber was proved similar to that in a conventional CFB riser. (C) 2015 Elsevier Ltd. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | HILBERT-HUANG TRANSFORM ; EXTERNAL HEAT-EXCHANGER ; TIME-SERIES ANALYSIS ; REGIMES ; HYDRODYNAMICS ; IDENTIFICATION ; DECOMPOSITION ; FLUCTUATIONS ; DISTRIBUTOR ; BOILER |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000359029200041 |
| 源URL | [http://ir.etp.ac.cn/handle/311046/98925]  |
| 专题 | 工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI） |
| 作者单位 | 1.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qiu, Guizhi,Ye, Jiamin,Wang, Haigang. Investigation of gas-solids flow characteristics in a circulating fluidized bed with annular combustion chamber by pressure measurements and CPFD simulation[J]. CHEMICAL ENGINEERING SCIENCE,2015,134:433-447. |
| APA | Qiu, Guizhi,Ye, Jiamin,&Wang, Haigang.(2015).Investigation of gas-solids flow characteristics in a circulating fluidized bed with annular combustion chamber by pressure measurements and CPFD simulation.CHEMICAL ENGINEERING SCIENCE,134,433-447. |
| MLA | Qiu, Guizhi,et al."Investigation of gas-solids flow characteristics in a circulating fluidized bed with annular combustion chamber by pressure measurements and CPFD simulation".CHEMICAL ENGINEERING SCIENCE 134(2015):433-447. |
入库方式： OAI收割
来源：工程热物理研究所
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