
Impeller
Rotor that increases fluid pressure and flow

Rotor that increases fluid pressure and flow
An impeller, or impellor, is a driven rotor used to increase the pressure and flow of a fluid. It is the opposite of a turbine, which extracts energy from, and reduces the pressure of, a flowing fluid. Strictly speaking, propellers are a sub-class of impellers where the flow both enters and leaves axially, but in many contexts the term "impeller" is reserved for non-propeller rotors where the flow enters axially and leaves radially, especially when creating suction in a pump or compressor.
Read on Wikipedia · Image Tiia Monto, CC BY-SA 3.0
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