Rotodynamic pumps - Operating mode : Operation outside the nominal point

Operation outside the nominal point
Rotodynamic pumps - Operating mode

Authors : Robert REY, Farid BAKIR, Jean POULAIN

Publication date: January 10, 2012 | Lire en français

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2. Operation outside the nominal point

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

H_{th \infty} = \frac{U_{2} V_{u 2 \infty}}{g}

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

\begin{matrix} V_{r 2} = \frac{Q}{2 π R_{2} b_{2}} \\ V_{u 2 \infty} = U_{2} - V_{r 2} tan β_{2 \infty} \end{matrix}

hence...

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Operation outside the nominal point

(1) - BELAMRI (T.) - Analyse aube à aube de l'écoulement instationnaire multigrilles par la méthode des singularités. Turbomachines à fluide incompressible. - Doctorat ENSAM (1998).
(2) - BAKIR (F.), KOUIDRI (S.), BELAMRI (T.), REY (R.) - On a general method of unsteady potential calculation applied...

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