The Influence of the Shape of Propeller Impeller Blades on Hydrodynamics and Efficiency.
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| Title: | The Influence of the Shape of Propeller Impeller Blades on Hydrodynamics and Efficiency. |
|---|---|
| Authors: | Stelmach, Jacek1 (AUTHOR) |
| Source: | Energies (19961073). May2026, Vol. 19 Issue 9, p2146. 21p. |
| Subject Terms: | *Propellers, *Hydrodynamics, *Axial flow, *Mechanical efficiency, *Mixing machinery |
| Abstract: | With rising energy prices, increasing the efficiency of the mechanical mixing process is becoming an important design issue. It is expected that with propeller impellers, efficiency can be increased by changing the shape and/or pitch of the blades. Three-blade propeller mixers with five different blade shapes and four strokes (from pb/D = 0.5 to pb/D = 2) were tested. The mixing power (by measuring the torque on the shaft), the pumping capacity (by measuring the axial velocity using the PIV method) and the pressure on the bottom of the stirred tank were determined. Based on the results of the research, it was found that the shape, surface and pitch of the blades affect the pumping efficiency. However, for a specific blade stroke, the effect of blade shape on mixing efficiency is small. Impellers with a small stroke show the best efficiency, and increasing the blade stroke reduces the efficiency of the process. However, the small pitch of the blades means that the liquid stream pumped by the impeller may turn out to be too small for the proper conduct of the process, e.g., obtaining slurries. Therefore, the most commonly used pb/D = 1 pitch turns out to be a good solution. Determining the relationship between pumping efficiency and bottom pressure allows you to determine the liquid stream pumped by the impeller based on the bottom pressure measurement. It has been confirmed that increasing pumping efficiency causes an increase in power demand according to pump theory because propeller impellers show similarities to the rotors of pumps and ship propellers. The theory of ship propellers is much better developed than the theory of mixing. Therefore, the possibility of using it to describe the mixing process could facilitate further research of propeller impellers. It was found that not all dependencies for ship propellers can be used to describe the mixing process. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 193716042 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: The Influence of the Shape of Propeller Impeller Blades on Hydrodynamics and Efficiency. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Stelmach%2C+Jacek%22">Stelmach, Jacek</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. May2026, Vol. 19 Issue 9, p2146. 21p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Propellers%22">Propellers</searchLink><br />*<searchLink fieldCode="DE" term="%22Hydrodynamics%22">Hydrodynamics</searchLink><br />*<searchLink fieldCode="DE" term="%22Axial+flow%22">Axial flow</searchLink><br />*<searchLink fieldCode="DE" term="%22Mechanical+efficiency%22">Mechanical efficiency</searchLink><br />*<searchLink fieldCode="DE" term="%22Mixing+machinery%22">Mixing machinery</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: With rising energy prices, increasing the efficiency of the mechanical mixing process is becoming an important design issue. It is expected that with propeller impellers, efficiency can be increased by changing the shape and/or pitch of the blades. Three-blade propeller mixers with five different blade shapes and four strokes (from pb/D = 0.5 to pb/D = 2) were tested. The mixing power (by measuring the torque on the shaft), the pumping capacity (by measuring the axial velocity using the PIV method) and the pressure on the bottom of the stirred tank were determined. Based on the results of the research, it was found that the shape, surface and pitch of the blades affect the pumping efficiency. However, for a specific blade stroke, the effect of blade shape on mixing efficiency is small. Impellers with a small stroke show the best efficiency, and increasing the blade stroke reduces the efficiency of the process. However, the small pitch of the blades means that the liquid stream pumped by the impeller may turn out to be too small for the proper conduct of the process, e.g., obtaining slurries. Therefore, the most commonly used pb/D = 1 pitch turns out to be a good solution. Determining the relationship between pumping efficiency and bottom pressure allows you to determine the liquid stream pumped by the impeller based on the bottom pressure measurement. It has been confirmed that increasing pumping efficiency causes an increase in power demand according to pump theory because propeller impellers show similarities to the rotors of pumps and ship propellers. The theory of ship propellers is much better developed than the theory of mixing. Therefore, the possibility of using it to describe the mixing process could facilitate further research of propeller impellers. It was found that not all dependencies for ship propellers can be used to describe the mixing process. [ABSTRACT FROM AUTHOR] |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=193716042 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/en19092146 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 21 StartPage: 2146 Subjects: – SubjectFull: Propellers Type: general – SubjectFull: Hydrodynamics Type: general – SubjectFull: Axial flow Type: general – SubjectFull: Mechanical efficiency Type: general – SubjectFull: Mixing machinery Type: general Titles: – TitleFull: The Influence of the Shape of Propeller Impeller Blades on Hydrodynamics and Efficiency. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Stelmach, Jacek IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 19961073 Numbering: – Type: volume Value: 19 – Type: issue Value: 9 Titles: – TitleFull: Energies (19961073) Type: main |
| ResultId | 1 |
