The Simulation and Experimental Validation on Gas-Solid Two Phase Flow in the Riser of a Dense Fluidized Bed
文献类型：期刊论文
| 作者 | Wang, Xue-yao; Jiang, Fan; Xu, Xiang; Wang, Sheng-dian; Fan, Bao-guo; Xiao, Yun-han |
| 刊名 | JOURNAL OF THERMAL SCIENCE
 |
| 出版日期 | 2009-04-01 |
| 卷号 | 18期号:2页码:137-141 |
| 关键词 | riser gas-solid flow drag force EMMS model |
| 英文摘要 | Gas-solid flow in dense CFB (circulating fluidized bed) riser under the operating condition, superficial gas 15.5 m/s and solid flux 140 kg/m2s using Geldart B particles (sand) was investigated by experiments and CFD (computational fluid dynamics) simulation. The overall and local flow characteristics are determined using the axial pressure profiles and solid concentration profiles. The cold experimental results indicate that the axial solid concentration distribution contains a dilute region towards the tip-middle zone and a dense region near the bottom and the top exit zones. The typical core-annulus structure and the back-mixing phenomenon near the wall of the riser can be observed. In addition, owing to the key role of the drag force of gas-solid phase, a revised drag force coefficient, based on the EMMS (energy-minimization multi-scale) model which can depict the heterogeneous character of gas-solid two phase flow, was proposed and Coupled into the CFD control equations. In order to find an appropriate drag force model for the simulation of dense CFB riser, not only the revised drag force model but some other kinds of drag force model were used in the CFD. The flow structure, solid concentration, clusters phenomenon, fluctuation of two phases and axial pressure drop were analyzed. By comparing the experiment with the simulation, the results predicted by the EMMS drag model showed a better agreement with the experimental axial average pressure drop and apparent solid volume fraction, which proves that the revised drag force based on the EMMS model is an appropriate model for the dense CFB simulation. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Thermodynamics ; Engineering, Mechanical |
| 研究领域[WOS] | Thermodynamics ; Engineering |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000265912800006 |
| 公开日期 | 2015-12-22 |
| 源URL | [http://ir.etp.ac.cn/handle/311046/106413]  |
| 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 | Chinese Acad Sci, Key Lab Adv Energy & Power, Inst Engn Thermophys, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Xue-yao,Jiang, Fan,Xu, Xiang,et al. The Simulation and Experimental Validation on Gas-Solid Two Phase Flow in the Riser of a Dense Fluidized Bed[J]. JOURNAL OF THERMAL SCIENCE,2009,18(2):137-141. |
| APA | Wang, Xue-yao,Jiang, Fan,Xu, Xiang,Wang, Sheng-dian,Fan, Bao-guo,&Xiao, Yun-han.(2009).The Simulation and Experimental Validation on Gas-Solid Two Phase Flow in the Riser of a Dense Fluidized Bed.JOURNAL OF THERMAL SCIENCE,18(2),137-141. |
| MLA | Wang, Xue-yao,et al."The Simulation and Experimental Validation on Gas-Solid Two Phase Flow in the Riser of a Dense Fluidized Bed".JOURNAL OF THERMAL SCIENCE 18.2(2009):137-141. |
入库方式： OAI收割
来源：工程热物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。