Impeller
In space and astronautical engineering, an impeller is a device used to move or pump fluids or gases. It consists of a rotating component, usually made of blades or vanes, which transfers energy to the fluid or gas. Impellers are commonly used in rocket engines, where they are used to pump fuel and oxidizer into the combustion chamber. They are also used in spacecraft propulsion systems, such as ion thrusters, to accelerate and expel propellant. Impellers can be designed to operate in a variety of environments, including vacuum and microgravity, and can be made from a variety of materials, including metals and composites.
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