Aspecte cavitaționale la robinete cu ventil

Abstract

Cavitation is the formation and simultaneous collapse of vapour cavities in a liquid – i.e. small liquid-free zones ("bubbles" or "voids") – that are the consequence of forces acting upon the liquid. When subjected to higher pressure, the voids implode and can generate an intense shock wave.Cavitation is a significant cause of wear in some engineering contexts. Collapsing voids that implode near to a metal surface cause cyclic stress through repeated implosion. This results in surface fatigue of the metal causing a type of wear also called "cavitation".