Experimental Comparison of Flow Fields at the Inlet and the Outlet of an Inducer With Shrouded and Unshrouded Configurations

[+] Author and Article Information
C. Offtinger, C. Henry, R. Morel, F. Spettel

Equipe Hydraulique I.N.S.A. Lyon, Laboratoire de Mécanique des Fluides et d’Acoustique, U.M.R. CNRS 5509 E.C.L., U.C.B. Lyon I, 20, ave A. Einstein, 69621 Villeurbanne, Cedex, France

J. Fluids Eng 119(4), 954-959 (Dec 01, 1997) (6 pages) doi:10.1115/1.2819523 History: Received April 08, 1996; Revised May 19, 1997; Online January 22, 2008


The flow field was measured near the inlet and the outlet of an axial flow inducer with shrouded and unshrouded configurations combined with a centrifugal pump. Investigations were conducted using a five-hole probe for several flow rates. The shroud induces a counterrotating flow at the inlet and a blockage effect at the outlet in the region of the tip and for all flow rates. The radial distribution of losses keeps the same shape in both configurations, however, the loss level is higher with the shroud, giving a lower efficiency for the combined inducer-impeller configuration. Effects of shrouded inducer on part load instability are not clear and deserve more research, which is in progress.

Copyright © 1997 by The American Society of Mechanical Engineers
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