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Unsteady Diffuser Vane Pressure and Impeller Wake Measurements in a Centrifugal Pump

Arndt, N. and Acosta, A. J. and Brennen, C. E. and Caughey, T. K. (1987) Unsteady Diffuser Vane Pressure and Impeller Wake Measurements in a Centrifugal Pump. In: Proceedings of the Eighth Conference on Fluid Machinery. Vol.1. Akadémiai Kiadó , Budapest, Hungary, pp. 49-56. ISBN 9630546477.

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Unsteady surface pressure measurements on a vaned diffuser of a centrifugal pump, and wake measurement 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 near the leading edge while decreasing along the vane.

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:ARNcfm87
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:180
Deposited By: Christopher Brennen
Deposited On:09 Mar 2020 14:56
Last Modified:02 Oct 2019 22:31

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