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RESEARCH PAPERS

Influence of the Nuclei on the Cavitation Inception for Different Types of Cavitation on Ship Propellers

[+] Author and Article Information
B. Gindroz

Bassin d’Essais des Carènes, 27400 Val de Reuil, France

M. L. Billet

Applied Research Laboratory, The Pennsylvania State University, State College, PA 16804

J. Fluids Eng 120(1), 171-178 (Mar 01, 1998) (8 pages) doi:10.1115/1.2819643 History: Received August 21, 1995; Revised December 04, 1996; Online December 04, 2007

Abstract

In order to relate nuclei size distributions with inception cavitation in cavitation facilities, a test program was conducted at the Grand Tunnel Hydrodynamique (GTH) of the Bassin d’Essais des Carènes. The GTH, which has a complete air control system including dissolved gas and nuclei (microbubbles) control, offers the opportunity to answer this question. The tests were conducted on the three 34 mm diameter propellers used by Kuiper (1981), each of these propellers being characterized by a different cavitation type: bubble, sheet and vortex cavitation. The water nuclei content correspond to strong degassed water (maximum tension), low injection of medium size nuclei (medium tension-low content), large injection of medium size nuclei (medium tension-high content) and large injection of large nuclei (minimum tension). By injecting medium size nuclei for a low content and a high content, we can examine the influence of the number of nuclei on the cavitation inception characteristic. During all the tests, the dissolved air content was kept constant. The GTH online Cavitation Nuclei Counter (Centerbody Venturi) was used to measure both the water nuclei distribution and the liquid tension. Comparisons are made with the calibrated Centerbody Venturi, a Phases Doppler Particles Analyzer (PDPA) and Holographic measurements.

Copyright © 1998 by The American Society of Mechanical Engineers
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