Agitator Design Calculation Xls 2021

He punched in the density and viscosity.

Change RPM, impeller size, or fluid viscosity to see immediate effects on power consumption.

: Fully turbulent flow (power consumption becomes independent of viscosity). : Laminar flow (viscous forces dominate). Step 2: Impeller Tip Speed agitator design calculation xls

User enters process parameters, tank size, fluid properties, and selects impeller type. Data validation dropdowns.

Using the maximum shear stress theory, the minimum solid shaft diameter required to withstand combined bending and torsion is: He punched in the density and viscosity

. Are you blending miscible liquids, suspending solids, or dispersing gas? The design begins by defining the of the fluids. In an XLS model, these inputs dictate the Reynolds Number

| Impeller Type | Power Number ($N_p$) | | :--- | :--- | | Rushton Turbine (6-blade) | 5.0 - 6.0 | | Pitched Blade Turbine (45°) | 1.2 - 1.5 | | High Efficiency (Hydrofoil) | 0.3 - 0.5 | | Propeller | 0.35 | : Laminar flow (viscous forces dominate)

For turbulent flow, the power number is typically obtained from standard curves or tables that relate $N_p$ to the impeller geometry. For example, a spreadsheet may contain lookup tables that provide $N_p$ values based on the (impeller diameter to tank diameter) for various impeller types, such as Rushton turbines, pitched-blade turbines, or hydrofoils.

Calculate the minimum shaft diameter based on combined torque and bending moments to prevent failure. Critical Speed ( Nccap N sub c

Divide by 0.85 to 0.95 depending on the gear type.

: Example calculations for multiple agitator configurations.