Hydrodynamique dans les milieux gas/liquide non-newtoniens ,agites mecaniquement, etude de l'helice a profil mince [HPM] et de la turbine a disque de Rushton

摘要

The power consumption is measured for non-newtonian gas-liquid systems. The useful zone situated beyond the flooding point was defined by using the power caracteristics plot and hydrodynamic observation. Correlations were established in dimensional or adimensional form, to estimate the stirrer speed at the flooding point, and the power consumption in the working zone. Those correlations established in a large scale of rheological behaviour, for two kind of impellers in different geometrical ratios and for two tanks for scaling up, are used to compare an axial impeller (the thinny profile propeller) to a radial one (the Rushton's disc turbine).