Influence of Bingham fluid viscosity on energy performances of a vortex chamber pump
| Autor: | Yevhen Medvediev, Andrii Rogovyi, Vladimir Korohodskyi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Abrasive Building and Construction Mechanics Computational fluid dynamics Pollution Industrial and Manufacturing Engineering Supercharger Vortex Viscosity General Energy Rheology Slurry Electrical and Electronic Engineering Bingham plastic business Civil and Structural Engineering |
| Zdroj: | Energy. 218:119432 |
| ISSN: | 0360-5442 |
| DOI: | 10.1016/j.energy.2020.119432 |
| Popis: | One of the problems in the development of coal-water technologies is the use of reliable and long-lasting pumps. To date, classic pumps, due to the use of mechanical moving parts and seals, are subject to rapid abrasive wear. The solution to this problem can lie in the creation of new vortex chamber pumps developed by the authors. They are highly reliable, simple in design and have no moving parts. The object of this paper consists in determining the range of vortex chamber pump performance when pumping Bingham fluids of different rheological parameters, as well as to determine the dependence of the pump efficiency on the Bingham viscosity and the yield stress. Study of the pump performance was conducted experimentally and with CFD simulation. It was found that an increase in the liquid viscosity reduces the vacuum value near the axis. For the first time it was found that the tenfold increase in plastic viscosity reduces the pump efficiency by about 20%. This results in the fact that the supercharger cannot pump the coal-water slurry with τ 0 > 12 Pa and μ B > 1 Pa ⋅ s. The findings can be extended not only to coal-water slurry, but also to all Bingham fluids. |
| Databáze: | OpenAIRE |
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