Article | REF: BM4302 V1

Rotodynamic pumps - Operating mode

Authors: Robert REY, Farid BAKIR, Jean POULAIN

Publication date: January 10, 2012

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2. Operation outside the nominal point

2.1 Characteristic curves of a centrifugal pump

The theoretical height, for an infinite number of blades, is given by Euler's relation :

Hth =U2Vu2g

Following the continuity equation and the property of output velocity triangles, we write :

Vr2=Q2πR2b2Vu2=U2Vr2tanβ2

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Operation outside the nominal point