An Experimental and Theoretical Investigation of Two-Dimensional Centrifugal-Pump Impellers

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Abstract
An experimental and theoretical investigation on a series of two-dimensional centrifugal-pump impellers has been made in an effort to determine the usefulness of potential theory for the description of the flow. Computed values of the developed head and pressure distribution on the vane surfaces are compared with measurements on two, four, and six-vaned logarithmic spiral impellers. The agreement between the observed and predicted quantities is reasonably good for operating points where the influence of the inlet turn on the internal flow is least. The discrepancies which occur at other flow rates are attributed to real fluid effects which are observed in the impeller passages.