Influence of recirculation on Y-Q characteristic curve of hydrodynamic pump
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Contribution is focused on discussion of different design modifications of the volute, impeller and rotor-stator cavity in case of very low specific speed pump with recirculation channels. Amount of the liquid flowing through the recirculation channels has significant effect on delivery height, stability of the head curve and hydraulic efficiency. Analysis of these effects is based on the evaluation of the dissipated power in different internal parts of the pump and for different flow rates. It has already been proved in our previous research that volute has substantial impact on stability of the head curve. It is apparent that similar effect can also be attributed to distribution and shape of the recirculation channels. This fact is connected with the inflow into the channels and with magnitude of the flow rate through the recirculation channels. Influence of mentioned parameters on recirculation is discussed in present paper.
Keywordslow specif speed pump, recirculation channels, volute
Document typePeer reviewed
Document versionFinal PDF
SourceEPJ Web of Conferences. 2016, vol. 114, issue 02054, p. 1-6.
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