Efficiency of PBT Impellers with Different Blade Cross-Sections

Jacek Stelmach, Radosław Musoski, Czesław Kuncewicz, Tomas Jirout and Frantisek Rieger
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Jacek Stelmach: Faculty of Process and Environmental Engineering, Lodz University of Technology, Wolczanska 213, 90-924 Lodz, Poland
Radosław Musoski: Faculty of Process and Environmental Engineering, Lodz University of Technology, Wolczanska 213, 90-924 Lodz, Poland
Czesław Kuncewicz: Faculty of Process and Environmental Engineering, Lodz University of Technology, Wolczanska 213, 90-924 Lodz, Poland
Tomas Jirout: Faculty of Mechanical Engineering, Czech Technical University in Prague, 16000 Prague, Czech Republic
Frantisek Rieger: Faculty of Mechanical Engineering, Czech Technical University in Prague, 16000 Prague, Czech Republic

Energies, 2022, vol. 15, issue 2, 1-19

Abstract: In this study, the mixing power and the axial and radial velocity distributions were determined for the standard PBT45-6 impeller with inclined blades and for three NACA impellers with airfoil blades. On the basis of the velocity distributions obtained by means of PIV techniques, the pumping efficiency and the size of the secondary circulation for the tested impellers were determined. The next stage was to calculate the efficiency of the impeller operation, in which the comparative criteria were the values of the mixing energy in the form of a dimensional and dimensionless criterion. The lowest mixing energy was obtained for impellers with symmetrical profiled NACA0021 blades, which was 20% lower than the similar mixing energy obtained for the standard PBT45-6 impeller.

Keywords: mixer hydrodynamics; mixing efficiency; impellers with different blade cross-sections (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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