The choice of impeller dictates the primary flow pattern (axial vs. radial). Your XLS should include a lookup table for common . Pitched Blade Turbine (PBT): Mixed flow, Rushton Turbine: High shear, radial flow, Hydrofoil: Efficient axial flow, Geometric Ratios: Ratio: Impeller diameter ( ) to Tank diameter ( ). Usually Off-bottom Clearance ( ): Distance from the impeller to the tank bottom. 3. Power Calculation Formulas This is the "engine" of your spreadsheet. The Power Equation:
To simplify this task, we are releasing a – a structured, user-friendly tool that handles key calculations for:
Many engineers have downloaded free .xls files from forums or university repositories. Most of these suffer from three fatal flaws:
: Calculations account for torque during startup and bending moments caused by hydraulic forces on the blades. Critical Speed ( Nccap N sub c
: Calculation of the Impeller-to-Tank diameter ratio (
If you are building your own sheet, ensure it includes these standard formulas: : Power : Shaft Torque :