Evaluation of multifluid model for heat transfer behavior of binary gas-solid flow in a downer reactor | |
Shu, Zhan1,2; Wang, Junwu1; Zhou, Quan1,2; Fan, Chuigang1; Li, Songgeng1 | |
刊名 | POWDER TECHNOLOGY |
2015-09-01 | |
卷号 | 281期号:SEP页码:34-48 |
关键词 | Fluidization Gas-solid flow Downer reactor Multifluid model Multiphase flow Heat transfer |
ISSN号 | 0032-5910 |
英文摘要 | The heat transfer characteristics of different particles during coal pyrolysis process are of fundamental importance in a downer reactor, where hot sand particles often serve as the heat carrier for heating cold coal particles. Despite its urgent practical demands, fundamental studies on this topic were still very limited so far. To this end, this work carded out computational fluid dynamics (CFD) investigations of heat transfer behavior of binary gas-solid flow in a downer reactor using multifluid model. A modified gas-solid drag model and a modified Gunn's gas-solid heat transfer coefficient model were used to address the critical role of particle cluster structure. Furthermore, the effects of constant or temperature-dependent air properties, particle-particle drag force, and particle-particle heat transfer as well as the different choices of kinetic theories of granular flow were systematically evaluated, and then the optimized models were identified. CFD simulations with the optimized models show that CFD simulation has the ability to qualitatively capture the key heat transfer features in downers, based on the fact that a fairly good agreement with the available experimental data in the literature can be obtained and be further improved by taking the specific shape of inlet distributor into account. (C) 2015 Elsevier B.V. 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] | CIRCULATING FLUIDIZED-BED ; COUNTERCURRENT DOWNER ; EULERIAN SIMULATION ; COAL-GASIFICATION ; ENTRANCE REGION ; MULTIPHASE FLOW ; CFD SIMULATION ; RISER ; DISTRIBUTOR ; PARTICLES |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000356996000006 |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/19320] |
专题 | 过程工程研究所_多相复杂系统国家重点实验室 |
作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Shu, Zhan,Wang, Junwu,Zhou, Quan,et al. Evaluation of multifluid model for heat transfer behavior of binary gas-solid flow in a downer reactor[J]. POWDER TECHNOLOGY,2015,281(SEP):34-48. |
APA | Shu, Zhan,Wang, Junwu,Zhou, Quan,Fan, Chuigang,&Li, Songgeng.(2015).Evaluation of multifluid model for heat transfer behavior of binary gas-solid flow in a downer reactor.POWDER TECHNOLOGY,281(SEP),34-48. |
MLA | Shu, Zhan,et al."Evaluation of multifluid model for heat transfer behavior of binary gas-solid flow in a downer reactor".POWDER TECHNOLOGY 281.SEP(2015):34-48. |
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