Calculation Pdf !link! Download Verified | Agitator Design
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): A mix of viscous and inertial forces. Flow patterns change rapidly. Turbulent Flow (
The app similarly helps calculate agitator power, shaft diameter, and stuffing box design. agitator design calculation pdf download verified
T=P2π⋅NT equals the fraction with numerator P and denominator 2 pi center dot N end-fraction = Torque ( Newton-metersNewton-meters Critical Speed Verification
Industrial mixing involves transferring kinetic energy from a rotating impeller into a fluid medium. The process requires balancing flow (circulation) and shear (fluid deformation). Flow vs. Shear Turbulent Flow ( The app similarly helps calculate
This determines how much fluid the impeller moves per second.
Gas-liquid dispersion, high shear, radial flow. Anchors / Helical Ribbons: High viscosity ( cP), laminar flow close to the wall. Standard sizing rule: The impeller diameter ( ) typically ranges between times the tank diameter ( Step 4: Power Calculation Calculate the required motor power ( ) using the Power Number ( Npcap N sub p ) specific to the selected impeller geometry: Calculate the Reynolds Number to determine the flow regime. Npcap N sub p Flow vs
critical speed window; maximum stress levels under locked-rotor torque do not exceed material yield strengths.
| Step | Action | Key Details | |---|---|---| | 1. Gather input data | Define vessel geometry, fluid properties, and operating conditions. | Include density, viscosity, temperature, baffle count, impeller speed, and shaft material stresses. | | 2. Perform power and agitation calculations | Compute power number, Reynolds number, and pumping capacity. | Determine flow regime using Re, and select impeller type and D/T ratio accordingly. | | 3. Calculate mechanical loads | Determine torque, bending moment, and forces on the impeller. | Torque is calculated as: | | 4. Design the shaft | Compute shaft diameter based on torque and bending. | Consider critical speed to avoid resonance failures. | | 5. Perform mixing intensity analysis | Calculate bulk fluid velocity and degree of agitation. | A degree of agitation between 3–5 is typical for slurry mixing in tanks. |
