Experimental Measurements in a Centrifugal Pump Impeller

[+] Author and Article Information
A. C. Bwalya, M. W. Johnson

Department of Mechanical Engineering, The University of Liverpool, P.O. Box 147, Liverpool L69 3BX, U.K.

J. Fluids Eng 118(4), 692-697 (Dec 01, 1996) (6 pages) doi:10.1115/1.2835497 History: Received March 24, 1995; Revised January 22, 1996; Online January 22, 2008


Measurements of the 3-d velocities, total and static pressures have been made in a 0.89 m diameter commercial pump impeller, using air as the working fluid. Results at the peak efficiency operating point show separation of the flow near the shroud on the pressure side of the blade at the leading edge. This separation results in a low energy region which initially travels axially through the impeller to form a wake in the suction side shroud corner region. A region of reversed radial velocity is observed at the outlet, which is due to high blade sweep angle together with the poor guidance given to the flow by the blades in the mid-passage region.

Copyright © 1996 by The American Society of Mechanical Engineers
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