Centrifugal Pumps

Centrifugal pumps are a form of rotodynamic pump which transfers Mechanical energy into Hydraulic energy by centrifugal force on the liquid. Typically, a rotating impeller within the centrifugal pumps increases the velocity of the fluid. The casing, also known as volute, of the pump operates to convert this increased velocity into an increase in pressure.

So if the mechanical energy is converted into a pressure head by centrifugal force, the pump has the task of escalating the fluid pressure within a machine or mechanism. Centrifugal pumps are frequently found here to transport liquid through a piping system developed in the 16th century, converting fluids into static pressure by using the kinetic energy produced. The process can be explained in physiological terms by Bernoulli’s principle which states that in an ideal fluid (low speed air is a good approximation), with no work being performed on the fluid, an increase in velocity occurs concurrently with decrease in pressure or a adjustment in the fluid's gravitational potential energy.

The procedure of this occurring starts with the rotation of the centrifugal pumps impeller accelerating the fluid as it dispatches from the impeller eye (centre) and outward through the impeller vanes to the periphery. As the liquid leaves the impeller, a percentage of the solutions momentum is then converted to (static) pressure. Generally the volute shape of the pump casing or the diffuser vanes helps in the energy conversion. The energy conversion results in an increased pressure on the downstream side of the pump, causing flow.

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