An experimental study addressing the erosion activity of axisymmetric
radiating systems that generate acoustic vibration due to the expulsio
n of the contents of a localized cavitation region is summarized. Two
cases were considered: a normal and an elevated (up to 2.4 MPa) static
pressure. In both cases, the erosion effects were determined in quant
itative terms. The elevated static pressure was found to increase the
erosion activity by almost two orders of magnitude. It is concluded th
at the erosion effect of a hydrodynamic radiator is determined by acou
stic cavitation, on which hydrodynamic cavitation is superimposed just
as a localized cavitation region is formed.