@article{Ceres_Jirout_Rieger_2010, title={Pitched Blade Turbine Efficiency at Particle Suspension}, volume={50}, url={https://ojs.cvut.cz/ojs/index.php/ap/article/view/1281}, DOI={10.14311/1281}, abstractNote={Mixing suspensions is a very important hydraulic operation. The pitched six-blade turbine is a widely-used axial-flow impeller. This paper deals with effect relative impeller size and particle content on theefficiency of a pitched six-blade turbine at particle suspension. Two pitched six-blade turbines were used in model measurements of just suspension impeller speed. The ratios of the vessel to agitator diameter <em>D/d</em> were 3 and 4.5. The measurements were carried out in a dish-bottomed vessel 300 mm in diameter. The just suspension impeller speeds were measured using an electrochemical method, and were checked visually. A 2.5 % NaCl water solution was used as the liquid phase, and glass particles with four equivalent diameters between 0.18 and 0.89 mmand volumetric concentration from 2.5 % to 40% were usedasthesolid phase. The criterion values <em>π<sub>s</sub>=P<sub>o</sub>√Fr’<sup>3</sup>(d/D)<sup>7</sup></em> were calculated from the particle suspension and power consumption measurements. The dependencies of <em>π<sub>s</sub></em> on particle content <em>c<sub>v</sub></em> show that larger agitators are more efficient for higher particle content.}, number={6}, journal={Acta Polytechnica}, author={Ceres, D. and Jirout, T. and Rieger, F.}, year={2010}, month={Jan.} }