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RESEARCH PAPERS

A New Approach to Evaluate the Cavitation Erosion Power

[+] Author and Article Information
Regiane Fortes Patella, Jean-Luc Reboud

Laboratoire des Ecoulements Géophysiques et Industriels, Institut de Mécanique de Grenoble, BP 53, 38041 Grenoble, Cédex 9, France

J. Fluids Eng 120(2), 335-344 (Jun 01, 1998) (10 pages) doi:10.1115/1.2820653 History: Received July 17, 1995; Revised January 12, 1998; Online December 04, 2007

Abstract

The dynamic response of various materials exposed to liquid jet and pressure wave impacts was simulated making use of an elastoplastic solid model. Numerical pit profiles were compared to experimental ones produced in test materials by the cavitation of water, mercury, or sodium. It was found that a high pressure wave emission was the main factor contributing to the observed cavitation damage. A parametric study concerning the pressure wave phenomenon was proposed and some similarity laws were obtained. By using these laws, the corresponding impact hydrodynamic parameters can be deduced from the pit geometric characteristics and the material properties. Based on that study, histograms concerning impact hydrodynamic parameters were plotted as a function of impact number and/or pit eroded volume. The influence of the mean flow velocity, the geometric scale, the fluid characteristics, and the material properties on the flow aggressivity could be evaluated during the cavitation incubation period.

Copyright © 1998 by The American Society of Mechanical Engineers
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