Choosing the right blade geometry changes the power requirement and overall process efficiency. Impeller Type Primary Application Typical Power Number ( Npcap N sub p NRecap N sub cap R e end-sub Low-viscosity blending Pitched Blade Turbine ( 45∘45 raised to the composed with power ) Combination Solid suspension, heat transfer Rushton Turbine (Flat Blade) Gas-liquid dispersion, high shear Anchor / Paddle Tangential High-viscosity blending ( Variable (Laminar) 4. Mechanical Design Considerations
L = H + 0.5 * D