ABSTRACT
A centrifugal pump is known to be a “pressure generator,” vs. a “flow generator,” which a rotary pump is. Essentially, a centrifugal pump has a rotating element, or several of them, which “impel” (hence the name impeller) the energy to the fluid. A collector (volute or a diffusor) guides the fluid to discharge. Figure 10 illustrates the principle of the developed head by the centrifugal pump. A good detailed derivation of the ideal head, generated by the impeller, is based on the change of the angular momentum between the impeller inlet and exit.
