Change in Mixing Power of a Two-PBT Impeller When Emptying a Tank
| Autor: | František Rieger, Łukasz Adrian, J. Stelmach, C. Kuncewicz, Tomáš Jirout |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Process Chemistry and Technology Mixing (process engineering) tank emptying Bioengineering 02 engineering and technology Mechanics axial impeller Edge (geometry) lcsh:Chemical technology 021001 nanoscience & nanotechnology Power (physics) increase of power consumption lcsh:Chemistry Mixing tank Impeller lcsh:QD1-999 020401 chemical engineering Free surface Chemical Engineering (miscellaneous) Torque lcsh:TP1-1185 0204 chemical engineering 0210 nano-technology |
| Zdroj: | Processes Volume 9 Issue 2 Processes, Vol 9, Iss 341, p 341 (2021) |
| ISSN: | 2227-9717 |
| DOI: | 10.3390/pr9020341 |
| Popis: | The paper presents research on the phenomenon of an increase in mixing power during the emptying of a tank with two 6-PBT45° axial impellers in operation, located on a common shaft, pumping the liquid to the bottom of the mixing tank. A large increase in mixing power took place when the free surface of the liquid was just above the upper edge of one of the impellers (hp/D < 0.1). This increase was even more than 50% compared to the design power for a fully filled mixing vessel. Admittedly, high motor overload, while not very long, may damage it. The study investigated the instantaneous torques acting on the impeller shaft during the emptying of the tank and the velocity distributions in planes r-z. On their basis, the mechanism of the phenomenon observed was determined and correlation relationships were given that permitted the calculation of the numerical values of the power increase factors. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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