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Rotordynamic Forces on Centrifugal Pump Impellers

Franz, R. and Arndt, N. and Caughey, T. K. and Brennen, C. E. and Acosta, A. J. (1987) Rotordynamic Forces on Centrifugal Pump Impellers. In: Proceedings of the Eighth Conference on Fluid Machinery. Akadémiai Kiadó , Budapest, Hungary, pp. 252-258. ISBN 9630546477 http://resolver.caltech.edu/CaltechAUTHORS:FRAecfm87

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Abstract

The asymmetric flow around an impeller in a volute exerts a force upon the impeller. To study the rotordynamic force on an impeller which is vibrating around its machine axis of rotation, the impeller, mounted on a dynamometer, is made to whirl in a circular orbit within the volute. The measured force is expressed as the sum of a steady radial force and an unsteady force due to the eccentric motion of the impeller. These forces were measured in separate tests on a centrifugal pump with radically increased shroud clearance, a two-dimensional impeller, and an impeller with an inducer, the impeller of the HPOTP (High Pressure Oxygen Turbopump) of the SSME (Space Shuttle Main Enginer). In each case, a destabilizing force was observed over a region of positive whirl.


Item Type:Book Section
Additional Information:The authors are indebted to the NASA George Marshall Space Flight Center for continued sponsorship of this research under contract NAS8-33108.
Record Number:CaltechAUTHORS:FRAecfm87
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:FRAecfm87
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:209
Collection:CaltechAUTHORS
Deposited By: Christopher Brennen
Deposited On:07 Jan 2005
Last Modified:26 Dec 2012 08:39

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