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Influence of impeller and diffuser geometries on the lateral fluid forces of whirling centrifugal impellerLateral fluid forces on two-dimensional centrifugal impellers, which whirl on a circular orbit in a vaneless diffuser, were reported. Experiments were further conducted for the cases in which a three-dimensional centrifugal impeller, a model of the boiler feed pump, whirls in vaneless and vaned diffusers. The influence of the clearance configuration between the casing and front shroud of the impeller was also investigated. The result indicated that the fluid dynamic interaction between the impeller and the guide vanes induces quite strong fluctuating fluid forces to the impeller, but nevertheless its influence on radial and tangential force components averaged over a whirling orbit is relatively small.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Ohashi, Hideo
(Tokyo Univ. (Japan). Yokohama, Japan)
Sakurai, Akira
(Kobe Steel Ltd. (Japan).)
Nishihama, Jiro
(Asahi Glass Co. Ltd.)
Date Acquired
September 5, 2013
Publication Date
February 1, 1989
Publication Information
Publication: NASA, Lewis Research Center, Rotordynamic Instability Problems in High-Perforance Turbomachinery, 1988
Subject Category
Mechanical Engineering
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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