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Effect of elevated pressure on gas-solid flow properties in a powder feeding system
- Source :
- Polish Journal of Chemical Technology, Vol 24, Iss 3, Pp 41-52 (2022)
- Publication Year :
- 2022
- Publisher :
- Sciendo, 2022.
-
Abstract
- In view of the powder feeding system, a multi-physical coupling model of the gas-powder-piston was established based on the Euler-Euler two-fluid model. The numerical simulation method was applied to explore the effects of dense gas-solid flow characteristics under different operating pressures. The results show that gas-solid pulsations at different operating pressures are mainly concentrated in the upper part of the powder tank. An elevated operating pressure efficiently decreases the powder layer area (εp = 0.1) fluctuation. As the operating pressure increases from 0.5 MPa to 3.0 MPa, the rising time and fluctuation rate of pressure are reduced by 71.4% and 62.3%, respectively, and the pressure in the tank has a long stabilization period. Meanwhile, the variation of the instantaneous powder flow rate is more stable and its average value is closer to the theoretical. A high-pressure environment is more conducive to the stable transportation of powder.
Details
- Language :
- English
- ISSN :
- 18994741
- Volume :
- 24
- Issue :
- 3
- Database :
- Directory of Open Access Journals
- Journal :
- Polish Journal of Chemical Technology
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.82d32e789e63483fb487dd4b78a965ac
- Document Type :
- article
- Full Text :
- https://doi.org/10.2478/pjct-2022-0021