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Rotordynamic Forces in Cavitating Inducers

Bhattacharyya, A. and Acosta, A. J. and Brennen, C. E. and Caughey, T. K. (1997) Rotordynamic Forces in Cavitating Inducers. Journal of Fluids Engineering, 119 (4). pp. 768-774. ISSN 0098-2202. http://resolver.caltech.edu/CaltechAUTHORS:BHAjfe97

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Abstract

This paper reports an experimental investigation of rotordynamic forces in a whirling axial flow inducer under the influence of cavitation at various flow coefficients. The results show the occurrence of large destabilizing peaks in the force tagential to the whirl orbit for positive whirl frequency ratios. The magnitude of the destabilizing forces increased with a decrease in cavitation number and flow coefficient. The rotordynamic data obtained do not exhibit quadratic functional behavior normally assumed in many rotordynamic models. Consequently, conventional generalized stiffness, damping, and intertia matrices cannot be determined for the inducer. The results demonstrate the complexity of rotordynamic forces and their consequences on stability of axial flow inducers.


Item Type:Article
Additional Information:Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division July 20, 1995; revised manuscript received March 19, 1997.
Record Number:CaltechAUTHORS:BHAjfe97
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:BHAjfe97
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39
Collection:CaltechAUTHORS
Deposited By: Christopher Brennen
Deposited On:13 Aug 2004
Last Modified:26 Dec 2012 08:38

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