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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. (1993) The Effect of Inlet Swirl on the Rotordynamic Shroud Forces in a Centrifugal Pump. Journal of Engineering for Gas Turbines and Power, 115 (2). pp. 287-293. ISSN 0742-4795. http://resolver.caltech.edu/CaltechAUTHORS:GUIjegtp93

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Abstract

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 demonstrate 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:Article
Additional Information:Contributed by the International Gas Turbine Institute and presented at the 37th International Gas Turbine and Aeroengines Congress and Exposition, Cologne, Germany, June 1-4, 1992. Manuscript received by the International Gas Turbine Institute February 11, 1992. Paper No. 92-GT-126. 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 NO. NAG8-118.
Record Number:CaltechAUTHORS:GUIjegtp93
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:GUIjegtp93
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103
Collection:CaltechAUTHORS
Deposited By: Christopher Brennen
Deposited On:08 Oct 2004
Last Modified:26 Dec 2012 08:39

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