Kavitationsdynamik in geschmierten Kontakten - Weiterentwicklung eines Modells mit Blasendynamik

Abstract

Cavitation is a widespread phenomenon in journal bearings and other lubricated contacts. In lubricated contacts, tensile stresses can occur in the lubricant as a result of cavitation dynamics. These tensile stresses, hardly known with respect to duration and magnitude, are investigated with a simulation model consisting of Reynolds equation and Rayleigh-Plesset equation for the negative squeeze motion of circular plate and spherical cap. The tensile stresses are practically relevant in calculating the opening times of valves (oil stiction). It may assumed that the short-time tensile stresses occurring in the simulation model also occur in other cases and have an influence on material fatigue and wear of the components involved and are thus practically relevant.