How Does A Centrifugal Pump Work?

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  Kishore . Man said,

  A centrifugal pump works by the conversion of the rotational kinetic energy, typically from an electric motor or turbine, to an increased static fluid pressure. This action is described by Bernoulli’s principle. The rotation of the pump impeller imparts kinetic energy to the fluid as it is drawn in from the impeller eye (centre) and is forced outward through the impeller vanes to the periphery. As the fluid exits the impeller, the fluid kinetic energy (velocity) is then converted to (static) pressure due to the change in area the fluid experiences in the volute section. Typically the volute shape of the pump casing (increasing in volume), or the diffuser vanes (which serve to slow the fluid, converting to kinetic energy in to flow work) are responsible for the energy conversion. The energy conversion results in an increased pressure on the downstream side of the pump, causing flow.

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  Socrates J said,

  If I remember my vocabulary, a centrifugal pump is a type of rotary pump. The water is brought into the pump, and a spinning impeller flings the liquid around and accelerates the fluid to increase the speed when the fluid exits.

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  The CLB said,

  If you care enough to ask, I hope you care enough to do some research. Start with this very detailed and well-layed out website, dedicated to centrifugal pumps: http://www.lightmypump.com. It has tutorials, education, data, and other references.

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