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Published November 1957 | Reprint
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An Experimental Study of Centrifugal-Pump Impellers


Experimental investigations were made on four two-dimensional impellers and on a well-designed commercial three-dimensional Francis impeller. The over-all performance of each of these impellers was measured and internal-energy loss and pressure-distribution data were also obtained for several impellers. The exit angle of the two-dimensional impellers was fixed and the inlet angle was systematically varied. However, the hydraulic characteristics of these impellers were all found to differ, the source of the variation being in the various loss distributions and hence internal flow patterns in the impellers. The two-dimensional and three-dimensional impeller-loss distributions were also different. The Francis-impeller performance agreed better with potential theory than that of the two-dimensional impellers, and it is included that the different loss distributions of the two types are responsible.

Additional Information

© 1957 The American Society of Mechanical Engineers. This work was supported by the Office of Naval Research, under Contract N6onr-244. Task Order II. Contributed by the Hydraulic Division and presented at the Annual Meeting, New York, N. Y., November 25-30, 1956 of the American Society of Mechanical Engineers. Manuscript received at ASME Headquarters, July 26, 1956. Paper No. 56-A-41.

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October 26, 2023