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Unsteady diffuser vane pressure and impeller wake measurements in a centrifugal pumpUnsteady surface pressure measurements on a vaned diffuser of a centrifugal pump, and wake measurements of the flow exiting a centrifugal impeller into a vaneless diffuser are presented. Frequency spectra and ensemble averages are given for the unsteady measurements. Two different impellers were used, the pump impeller of the HPOTP (High Pressure Oxygen Turbopump) of the SSME (Space Shuttle Main Engine) and a two-dimensional impeller. The magnitude of the unsteady total pressure measured in the stationary frame at the impeller exit was found to be of the same order of magnitude as the total pressure rise across the pump. The magnitude of the unsteady diffuser vane pressures was observed to be significantly different on suction and pressure side of the vane, attaining its largest value on the suction side the leading edge while decreasing along the vane.
Document ID
19880049876
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Arndt, N.
(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 Institute of Technology Pasadena, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
88A37103
Funding Number(s)
CONTRACT_GRANT: NAS8-33108
Distribution Limits
Public
Copyright
Other

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