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Some Unsteady Fluid Forces on Pump Impellers

Miskovish, R. S. and Brennen, C. E. (1992) Some Unsteady Fluid Forces on Pump Impellers. Journal of Fluids Engineering, 114 (4). pp. 632-637. ISSN 0098-2202. http://resolver.caltech.edu/CaltechAUTHORS:MISjfe92

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Abstract

Spectral analyses of all the forces and moments acting on a typical centrifugal pump impeller/volute combination are presented. These exhibit shaft frequencies, blade passing frequencies, and beat frequencies associated with a whirl motion imposed on the shaft in order to measure rotordynamic forces. Among other features the unsteady thrust was found to contain a surprisingly large blade passing harmonic. While previous studies have explored the magnitudes of the steady fluid-induced radial forces and the fluid-induced rotordynamic forces for this typical centrifugal pump impeller/volute combination, this paper presents information on the steady bending moments and rotordynamic moments due to the fluid flow. These imply certain axial locations for the lines of action of the radial and rotordynamic forces. Data on the lines of action are presented and allow inferences on the sources of the forces.


Item Type:Article
Additional Information:Contributed by the Fluids Engineering Division for publication in the Journal of Fluids Engineering. Manuscript received by the Fluids Engineering Division April 16, 1991. This work was performed under Contract NAS 8-33108 from NASA George Marshall Space Flight Center, Huntsville, Alabama; the authors are very grateful for their support. We should also like to express our thanks to R. Franz, N. Arndt, A. J. Acosta, and T. K. Caughey for their help during the conduct of this research program.
Record Number:CaltechAUTHORS:MISjfe92
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:MISjfe92
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:130
Collection:CaltechAUTHORS
Deposited By: Christopher Brennen
Deposited On:18 Oct 2004
Last Modified:26 Dec 2012 08:39

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