Impeller vs. Propeller

An impeller or impellor is a 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.

A propeller is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral, that, when rotated, exerts linear thrust upon a working fluid, such as water or air. Propellers are used to pump fluid through a pipe or duct, or to create thrust to propel a boat through water or an aircraft through air.

the rotating part of a centrifugal pump, compressor, or other machine designed to move a fluid by rotation.

a mechanical device for propelling a boat or aircraft, consisting of a revolving shaft with two or more broad, angled blades attached to it.

One that impels, as a rotating device used to force a fluid in a desired direction under pressure.

A device for propelling an aircraft or boat, consisting of a spinning shaft with radiating angled blades that thrust air or water in the direction opposite the desired direction of travel.

A rotor or rotor blade.

One who, or that which, propels.

Something which or someone who impels.

A mechanical device with evenly-shaped blades that turn on a shaft to push against air or water, especially one used to propel an aircraft or boat.

A rotating component that accelerates fluid outward from a center of rotation, found in devices such as pumps, water jets, washing machines, and agitated tanks.

A steamboat thus propelled; a screw steamer.

One who, or that which, impels.

(fishing) A spinnerbait.

the blade of a rotor (as in the compressor of a jet engine)

One who, or that which, propels.

A contrivance for propelling a steam vessel, usually consisting of a screw placed in the stern under water, and made to revolve by an engine; a propeller wheel.

A steamboat thus propelled; a screw steamer.

a mechanical device that rotates to push against air or water