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The Rotordynamic Forces on a Centrifugal Pump Impeller in the Presence of Cavitation

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Title The Rotordynamic Forces on a Centrifugal Pump Impeller in the Presence of Cavitation
 
Creator Franz, R.
Acosta, A. J.
Brennen, C. E.
Caughey, T. K.
 
Subject Caltech Library Services
 
Description An experiment in forced vibration was conducted to study the fluid-induced rotordynamic force on an impeller whirling along a trajectory eccentric to its undeflected position. The prescribed whirl trajectory of the rotor is a circular orbit of a fixed radius. The force measured is a combination of a steady radial force due to volute asymmetries and an unsteady force due to the eccentric motion of the rotor. These measurements have been conducted over a full range of whirl/impeller speed ratios at different flow coefficients for various turbomachines. A destabilizing force was observed over a region of positive whirl ratio. The range of flow conditions examined for a centrifugal impeller in a spiral volute has been enlarged to include cavitation. Compared to the non-cavitating condition, cavitation corresponding to a head loss of three percent did not have a significant effect upon the unsteady force.
 
Publisher American Society of Mechanical Engineers
 
Contributor Cooper, P.
 
Date 1989-07
 
Type Book Section
PeerReviewed
 
Format application/pdf
 
Identifier http://authors.library.caltech.edu/210/1/FRA096.pdf
Franz, R. and Acosta, A. J. and Brennen, C. E. and Caughey, T. K. (1989) The Rotordynamic Forces on a Centrifugal Pump Impeller in the Presence of Cavitation. In: Pumping Machinery, 1989 : presented at the Third Joint ASCE/ASME Mechanics Conference, University of California, San Diego, La Jolla, California, July 9-12, 1989 / sponsored by the Fluids Engineering Division, ASME. Fluids Engineering Division. Vol.FED-81. No.81. American Society of Mechanical Engineers , New York, pp. 205-211. ISBN 0791803449 http://resolver.caltech.edu/CaltechAUTHORS:FRAasmespm89 <http://resolver.caltech.edu/CaltechAUTHORS:FRAasmespm89>
 
Relation http://resolver.caltech.edu/CaltechAUTHORS:FRAasmespm89
http://authors.library.caltech.edu/210/