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RESEARCH PAPERS

A Cavitation Susceptibility Meter With Optical Cavitation Monitoring—Part Two: Experimental Apparatus and Results

[+] Author and Article Information
L. d’Agostino, A. J. Acosta

California Institute of Technology, Pasadena, CA 91125

J. Fluids Eng 113(2), 270-277 (Jun 01, 1991) (8 pages) doi:10.1115/1.2909491 History: Received July 20, 1989; Online May 23, 2008

Abstract

This work is concerned with the development and operation of a Cavitation Susceptibility Meter based on the use of a venturi tube for the measurement of the active cavitation nuclei concentration in water samples as a function of the applied tension. The pressure at the venturi throat is determined from the upstream pressure and the local flow velocity without corrections for viscous effects because the flow possesses a laminar potential core in all operational conditions. The detection of cavitation and the measurement of the flow velocity are carried out optically by means of a Laser Doppler Velocimeter. A custom-made electronic Signal Processor is used for real time data generation and temporary storage and a computerized system for final data acquisition and reduction. The implementation of the whole system is described and the results of the application of the Cavitation Susceptibility Meter to the measurement of the water quality of tap water samples are presented and critically discussed with reference to the current state of knowledge on cavitation inception.

Copyright © 1991 by The American Society of Mechanical Engineers
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