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1 Chemical and Process Engineering

1 2014

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Study of the Turbulent Flow Structure around a Standard Rushton Impeller

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Kysela B. , Konfršt J. , Fořt I. , Kotek M. , Chára Z.

Chemical and Process Engineering

2014

tom 35

nr 1

137-147

The velocity field around the standard Rushton turbine was investigated by the Laser Doppler Anemometry (LDA) and Particle Image Velocimetry (PIV) measurements. The mean ensembleaveraged velocity profiles and root mean square values of fluctuations were evaluated at two different regions. The first one was in the discharge stream in the radial direction from the impeller where the radial flow is dominant and it is commonly modelled as a swirling turbulent jet. The validity range of the turbulent jet model was studied. The second evaluated region is under the impeller where flow seems to be at first sight rather rigorous but obtained results show nonnegligible values of fluctuation velocity.