Experimental and numerical study of secondary flow in a T-type bend of a CFB riser
| Autor: | Yaodong Wei, Di Wang, Jianfei Song, Chaoyu Yan, Faqi Zhou, Mengda Jia, Liqiang Sun |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Turbulence General Chemical Engineering 02 engineering and technology General Chemistry Periodic flow Mechanics Flow pattern Renormalization group Secondary flow 01 natural sciences Industrial and Manufacturing Engineering Kármán vortex street 010305 fluids & plasmas Vortex Physics::Fluid Dynamics 020401 chemical engineering 0103 physical sciences Environmental Chemistry Particle 0204 chemical engineering |
| Zdroj: | Chemical Engineering Journal. 334:1222-1232 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2017.10.187 |
| Popis: | Periodic flow behavior was investigated in a T-type bend of a circulating fluidized-bed riser. With the geldart group A particle, experimental observations suggested that a periodic flow behavior formed under certain conditions. The gas velocity in the T-type bend was simulated using a renormalization group k-e turbulence model and measured by hot-wire anemometry. Flow patterns in the T-type bend were numerically studied under different superficial gas velocities. Preliminary results suggested that there was a pair of vortices moving periodically in the T-type bend, appearing, increasing, decreasing, and shedding in a cycle, which possessed partial characteristics of a Karman vortex street and Dean vortex. When the superficial gas velocity Vg was low ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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