An impeller is a rotating component found in various machines, such as pumps and turbines. Its primary function is to move fluids by converting rotational energy into kinetic energy. The design typically features blades or vanes that push the fluid outward as the impeller spins, creating flow and pressure. Impellers are commonly used in applications like centrifugal pumps, where they help transport water or other liquids. They can also be found in jet engines, where they assist in compressing air. The efficiency and performance of an impeller depend on its shape, size, and the speed at which it rotates.