Flow Induced by Dual-Turbine of Different Diameters in a Gas-Liquid Agitation System: the Agitation and Turbulence Indices - Archive ouverte HAL Access content directly
Journal Articles International Journal of Chemical Reactor Engineering Year : 2006

Flow Induced by Dual-Turbine of Different Diameters in a Gas-Liquid Agitation System: the Agitation and Turbulence Indices

Abstract

Flow induced by a dual turbine stirred tank was characterized measuring local velocities with a LDV and drawing the main velocity fields and the maps of turbulence intensities. The hydrodynamic regime studied in all the experiments was the so-called merging flow regime. Two impeller configurations were studied. In the first one, two disk style turbine of the same dimensions (configuration A) were used, while in the second one, the dimensions of the upper turbine were 20 % proportionally smaller than those of the lower turbine (configuration B). The agitation and turbulence indices were used to evaluate, as a first order approximation, the power consumption distribution between convective and turbulent flows. The comparison of the two-phase agitation systems studied showed that configuration B seems to be more efficient than configuration A, since both induce a similar global convective flow, but the first one assures a significant reduction of power consumption. The distribution of power consumption between convective and turbulent flows was evaluated using the agitation index and a new global parameter: turbulence inde
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Dates and versions

hal-04310459 , version 1 (27-11-2023)

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Daniel Garcia-Cortes, Catherine Xuereb, Patricia Taillandier, Ulises Javier Jáuregui Haza, Joël Bertrand. Flow Induced by Dual-Turbine of Different Diameters in a Gas-Liquid Agitation System: the Agitation and Turbulence Indices. International Journal of Chemical Reactor Engineering, 2006, 4 (1), pp.1-12. ⟨10.2202/1542-6580.1322⟩. ⟨hal-04310459⟩
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