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The Tangential Velocity of Impeller at Outlet (u₂) is the linear velocity at the outer edge of a rotating impeller. It represents the speed at which fluid particles move tangentially at the impeller's outlet and is crucial for determining the energy transfer in centrifugal pumps and turbines.
The calculator uses the formula:
Where:
Explanation: The tangential velocity is calculated by multiplying the angular velocity (rotational speed) by the radius at the outlet of the impeller.
Details: Tangential velocity is essential for determining the head developed by centrifugal pumps, analyzing pump performance, designing efficient turbomachinery, and understanding fluid dynamics in rotating systems.
Tips: Enter angular velocity in radians per second and radius in meters. Both values must be positive numbers. The calculator will compute the tangential velocity at the impeller outlet.
Q1: What is the difference between angular velocity and tangential velocity?
A: Angular velocity (ω) measures rotational speed in radians per second, while tangential velocity (u) is the linear speed at a specific radius from the rotation axis.
Q2: How does impeller radius affect tangential velocity?
A: For a constant angular velocity, tangential velocity increases proportionally with the radius. Larger impellers produce higher tangential velocities at the outlet.
Q3: Why is tangential velocity important in pump design?
A: Tangential velocity directly influences the kinetic energy imparted to the fluid, which affects the pump's head generation and overall efficiency.
Q4: Can this formula be used for any rotating impeller?
A: Yes, this fundamental relationship applies to any rotating body, including pump impellers, turbine blades, and other rotating machinery components.
Q5: What are typical units for these measurements?
A: Angular velocity is typically measured in rad/s or RPM, radius in meters or feet, and tangential velocity in m/s or ft/s.