A Study of CFD Simulations of the Flow Pattern in an Agitated System with a Pitched Blade Worn Turbine

• Authors: Jan Skočilas , Ivan Fořt , Tomáš Jirout
• Languages of publication: EN

Abstracts

EN

This paper presents a numerical analysis of an agitated fully baffled cylindrical vessel with a down pumping four blade worn or unworn pitched blade impeller (α = 45° and 30°) under a turbulent flow regime. CFD simulations predict the pumping capacity of the system equipped by worn and unworn pitched blade impeller. Experimental data were taken from the authors’ previous work and compared with results of numerical computations. A good agreement with experimental data was obtained. The ensemble-average mean velocity field with worn and unworn impellers was computed. It follows from the simulation results that the wear rate of the impeller blade has a significantly negative effect on the velocity distribution in an agitated liquid. The greater the destruction of the worn blade, the higher is the deformation of the velocity field around the rotating impeller, with a simultaneous decrease in impeller pumping capacity.

Keywords

EN

pitched blade impeller; erosion wear; ensemble-average mean velocity; impeller pumping capacity; CFD simulation

• Publisher: De Gruyter Open
• Journal: Chemical and Process Engineering
• Year: 2013
• Volume: 34
• Issue: 1
• Pages: 39-49

Dates

published

1 - 03 - 2013

online

02 - 04 - 2013

Contributors

author

Jan Skočilas

• Czech Technical University in Prague, Faculty of Mechanical Engineering, Department of Process Engineering, Technicka 4, Prague, Czech Republic

author

Ivan Fořt

• Czech Technical University in Prague, Faculty of Mechanical Engineering, Department of Process Engineering, Technicka 4, Prague, Czech Republic

author

Tomáš Jirout

• Czech Technical University in Prague, Faculty of Mechanical Engineering, Department of Process Engineering, Technicka 4, Prague, Czech Republic

References

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Identifiers

DOI

10.2478/cpe-2013-0004