The fundamental calculation for an agitator is the power needed to rotate the impeller through a fluid. This is influenced by the fluid's viscosity and density, as well as the impeller's geometry. IQS Directory Power Formula: cap N sub p (Power Number):
Restrict impeller types and shaft materials (e.g., SS316, Carbon Steel, Alloy 20) to dropdown menus tied to hidden lookup tables. agitator design calculation xls repack
) is the power delivered to the fluid . To size the actual motor, the spreadsheet accounts for mechanical losses: The fundamental calculation for an agitator is the
Power consumption depends on the selected impeller's characteristic Power Number ( Npcap N sub p ), which changes based on the Reynolds number. ) is the power delivered to the fluid
Shaft diameter sizing, torque, bending moments, critical speed. Reference lookup curves Npcap N sub p curves for different impellers (Rushton, Hydrofoil). Summary of Reference Constants Use these standard turbulent Power Numbers ( Npcap N sub p ) in your database tab for preliminary sizing: Rushton Turbine (6-Flat Blade): (High shear, gas dispersion) Pitched Blade Turbine ( 45∘45 raised to the composed with power ): (Axial flow, macro-blending) Hydrofoil (High-Efficiency Axial): (Low shear, high pumping efficiency)
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