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Experimental measurements of hydrodynamic stiffness matrices for a centrifugal pump impellerThe objective of the Rotor Force Test Facility at the California Institute of Technology is to artificially orbit the center of rotation of an impeller enclosed within a volute over a range of frequencies from zero to synchronous and to measure the resulting forces on the impeller. Preliminary data from the first stage experiments in which the shaft is orbited at low frequency is reported. Steady volute forces along with stiffness matrices due to the change in position of the rotor center are measured. Static pressure taps around the volute are used to obtain volute pressure distributions for various fixed positions of the impeller center and for various flow rates. Static pressure forces are calculated from these pressure distributions allowing a more complete analysis of the components of the impeller forces. Comparison is made with various existing theoretical and experimental results.
Document ID
19830007382
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chamieh, D. S.
(California Inst. of Tech. Pasadena, CA, United States)
Acosta, A. J.
(California Inst. of Tech. Pasadena, CA, United States)
Brennen, C. E.
(California Inst. of Tech. Pasadena, CA, United States)
Caughey, T. K.
(California Inst. of Tech. Pasadena, CA, United States)
Franz, R.
(California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 11, 2013
Publication Date
December 1, 1982
Publication Information
Publication: NASA. Lewis Research Center Rotordyn. Instability Probl. in High-Performance Turbomachinery
Subject Category
Mechanical Engineering
Accession Number
83N15653
Funding Number(s)
CONTRACT_GRANT: NAS8-33108
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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