To improve cavitation erosion prediction based on induced
vibrations, some experimental work has been carried out on two
different materials, a stainless steel and a protective coating.
First, the erosive characteristics of the materials have been
analyzed in a cavitating vortex generator. Pit counting results
have been correlated to inferred force intensities occurring on
the eroded area from measured vibrations considering the
transmissibility from the excitation location to the measuring
position. The relationship between the pit area and the force
intensity has been calculated. To validate these results, the same
materials have been tested in a hydrodynamic tunnel where the
force intensities have been inferred in the same way. Then, the
eroded area has been calculated using the erosion characteristics
previously determined. The results obtained compare well with with
the actual erosion measured on the tunnel specimens. Next step is
to apply this method to hydraulic machines
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