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Published June 11, 2000 | public
Conference Paper Open

The Effect of Experimental Facility Dynamics on a Cavitation Instability

Abstract

This paper presents the results of an investigation assessing the role experimental facility dynamics might play in determining the nature of a recently observed instability on a cavitating propeller (Duttweiler and Brennen 1999). To address this question, a theoretical model of the facility dynamics is developed. Experiments were conducted to measure the response of the water tunnel facility to volumetric excitations of varying amplitude and frequency, and the measurements are compared with the response predicted by the model. The dynamics of the propeller cavitation are characterized by estimating two parameters (cavitation compliance and mass flow gain factor) previously employed in developing a system transfer function for cavitating pumps (Brennen 1994). Finally, the characteristics of a model for the complete system, incorporating both the cavitating propeller and the experimental facility dynamics, are discussed.

Additional Information

FEDSM2000-11015 The authors would like to acknowledge the support of the Office of Naval Research and technical monitor Dr. Edwin Rood for their generous support of this research. The research program was funded under Contract N00014-97-1-0002. Finally, Dr. Teiichi Tanaka provided much assistance in conducting the tunnel response experiments.

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Created:
August 21, 2023
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October 13, 2023