Characterization on the hydrodynamics of a covering-plate Rushton impeller

Su, Tenglong; Yang, Fengli; Li, Meiting; Wu, Kanghui

doi:10.1016/j.cjche.2017.11.015

Cited by 12 publications

(6 citation statements)

References 32 publications

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“…Ferrari and Rossi [8] and Rossi et al [9] measured the mixing efficiency in a quasi-turbulent flow via the experimental measurements of power input and output in the flow. The study of T. Su et al [10] compared the hydrodynamics of the fluid and mixing process using the classical Rushton turbine and modified one. The results showed that 18% power decrease in the case of modified Rushton turbine.…”

Section: Introductionmentioning

confidence: 99%

An experimental investigation on the fluid flow mixing process in agitated vessel

Młynarczykowska

Ferrari²,

Demurtas³

et al. 2022

EPJ Web Conf.

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The fluid mixing process is a common supportive phenomenon that often occurs in a large number of industrial systems. This phenomenon is the subject of many numerical and experimental analysis. The mixing process effectiveness depends on: mixing tank construction, mixing phases viscosity, temperature, density of liquids and, what is crucial, the impeller shape. The optimal design of impeller geometry is still an open issue. In this research work, the main objective is experimental investigations of the influence of the newly constructed impeller type on the fluid flow motion phenomena and energy consumption. Flow field values were evaluated using PIV measurement and the power consumption using precise torquemeter. The comparison between the Rushton turbine and a novel impeller is presented and discussed. The basis for the assessment of the intensity degree and efficiency of mixing was the analysis of velocity vectors distribution and power number. Results show that the power number for both impellers are similar but the fluid motion is quite different. The pumping capacity Qz for the novel impeller in reference to the Rushton turbine is for many cases at least one order of magnitude higher. This shows that the proposed impeller can be a very promising alternative to the classic blades and non-blades based impeller types.

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Section: Introductionmentioning

confidence: 99%

An experimental investigation on the fluid flow mixing process in agitated vessel

Młynarczykowska

Ferrari²,

Demurtas³

et al. 2022

EPJ Web Conf.

View full text Add to dashboard Cite

show abstract

“…In a research study performed by T. Su et al [3] the power consumption, the fluid phenomenon, hydrodynamics of the flow, and the mixing process using the Rushton-type impellers were compared. The analyses showed an 18% decrease in power owing to the modification of the Rushton turbine shape, which also managed to enhance the local fluid velocity and obtain higher turbulence intensity around the optimized impeller.…”

Section: Introductionmentioning

confidence: 99%

Effect of Impeller Design on Power Characteristics and Newtonian Fluids Mixing Efficiency in a Mechanically Agitated Vessel at Low Reynolds Numbers

2020

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The mixing process is a widespread phenomenon, which plays an essential role among a large number of industrial processes. The effectiveness of mixing depends on the state of mixed phases, temperature, viscosity and density of liquids, mutual solubility of mixed fluids, type of stirrer, and, what is the most critical property, the shape of the impeller. In the present research, the objective was to investigate the Newtonian fluids flow motion as well as all essential parameters for the mechanically agitated vessel with a new impeller type. The velocity field, the power number, and the pumping capacity values were determined using computer simulation and experimental measurements. The basis for the assessment of the intensity degree and the efficiency of mixing had to do with the analysis of the distribution of velocity vectors and the power number. An experimental and numerical study was carried out for various stirred process parameters and for fluids whose viscosity ranged from low to very high in order to determine optimal conditions for the mixing process.

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“…Knowledge of the flow inside the agitated tank is also the background for better understanding of the mixing processes, scale-up modeling, and geometry improvement. Various experimental and numerical studies reported on local flow information, with a view to optimizing the mixing processes (for example, [1][2][3][4][5]). For instance, the flow structures are identified to be highly three dimensional (3D) and complex, with trailing vortices and high-turbulence levels (and dissipation rates) in the vicinity of the impeller [6,7].…”

Section: Introductionmentioning

confidence: 99%

Effect of impeller blade curvature on the hydrodynamics and power consumption in a stirred tank

Foukrach

Ameur²

2020

CI&CEQ

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The performance of curved bladed turbines (CBTs) for the agitation of Newtonian fluids in cylindrical tanks is investigated. The efficiency of CBT is compared with that of the standard Rushton turbine. Also, effects of the blade height of the new designed impeller are highlighted. The CFD (Computational Fluid Dynamics) study is performed to observe the axial, radial and tangential components of velocities, flow patterns and power consumption. The obtained results revealed that the increase of blade curvature reduces the power consumption. Also, a slight decrease of power number is observed in the turbulent flow regime within unbaffled tanks. In a comparison between the cases studied, the best axial circulation of fluid is given by the impeller with flat blades. The increase of the height of curved blades has generated a stronger tangential flow and enhanced the axial movement of fluid particles, but with further penalty in power input.

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Characterization on the hydrodynamics of a covering-plate Rushton impeller

Cited by 12 publications

References 32 publications

An experimental investigation on the fluid flow mixing process in agitated vessel

An experimental investigation on the fluid flow mixing process in agitated vessel

Effect of Impeller Design on Power Characteristics and Newtonian Fluids Mixing Efficiency in a Mechanically Agitated Vessel at Low Reynolds Numbers

Effect of impeller blade curvature on the hydrodynamics and power consumption in a stirred tank

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