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The Effect of Inlet Swirl on the Rotordynamic Shroud Forces in a Centrifugal Pump

Guinzburg, A. and Brennen, C. E. and Acosta, A. J. and Caughey, T. K. (1992) The Effect of Inlet Swirl on the Rotordynamic Shroud Forces in a Centrifugal Pump. American Society of Mechanical Engineers , New York.

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The role played by fluid forces in determining the rotordynamic stability of a centrifugal pump is gaining increasing attention. The present research investigates the contributions to the rotordynamic forces from the discharge-to-suction leakage flows between the front shroud of the rotating impeller and the stationary pump casing. In particular, the dependency of the rotordynamic characteristics of leakage flows on the swirl at the inlet to the leakage path was examined . An inlet guide vane was designed for the experiment so that swirl could be introduced at the leakage flow inlet. The data demonstrates substantial rotordynamic effects and a destabilizing tangential force for small positive whirl ratios; this force decreased with increasing flow rate. The effect of swirl on the rotordynamic forces was found to be destabilizing.

Item Type:Report or Paper (Discussion Paper)
Additional Information:The assistance provided by F. Zhuang, A. Bhattacharyya, F. Rahman and Sandor Nagy with the experimental program is greatly appreciated. We would also like to thank NASA George Marshall Space Flight Center for support under Grant NAG8-118.
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ASME Papers92-GT-126
Record Number:CaltechAUTHORS:20120105-103828941
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:28669
Deposited By: George Porter
Deposited On:05 Jan 2012 19:45
Last Modified:03 Oct 2019 03:34

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