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Laser Velocimeter Measurements in the Leakage Annulus of a Whirling Shrouded Centrifugal Pump

Sivo, J. M. and Acosta, A. J. and Brennen, C. E. and Caughey, T. K. and Ferguson, T. V. and Lee, G. A. (1994) Laser Velocimeter Measurements in the Leakage Annulus of a Whirling Shrouded Centrifugal Pump. In: ASME Symposium on Laser Anemometry. Fluids Engineering Division. Vol.FED-191. No.191. American Society of Mechanical Engineers , New York, pp. 111-117.

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Previous experiments conducted in the Rotor Force Test Facility at the California Institute of Technology have thoroughly examined the effect of leakage flows on the rotordynamic forces on a centrifugal pump impeller undergoing a prescribed circular whirl. These leakage flows have been shown to contribute substantially to the total fluid induced forces acting on a pump. However, to date nothing is known of the flow field in the leakage annulus of shrouded centrifugal pumps. No attempt has been made to qualitatively or quantitatively examine the velocity field in the leakage annulus. Hence the test objective of this experiment is to acquire fluid velocity data for a geometry representative of the leakage annulus of a shrouded centrifugal pump while the rotor is whirling using laser velocimetry. Tests are performed over a range of whirl ratios and a flowrate typical of Space Shuttle Turbopump designs. In addition to a qualitive study of the flow field, the velocity data can be used to anchor flow models.

Item Type:Book Section
Additional Information:The assistance provided by Caltech graduate student Qiao Lin with the experimental program is appreciated. We would also like to thank Mike Yandell of Rocketdyne for the test section design.
Record Number:CaltechAUTHORS:SIVasla94
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:150
Deposited By: Christopher Brennen
Deposited On:29 Oct 2004
Last Modified:24 Dec 2014 17:04

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