Influence of a transient bubble dynamics cavitation model for squeeze film dampers on the run‐up behaviour of a turbocharger rotor

Abstract The force response of squeeze film dampers and hydrodynamic bearings is significantly influenced by the occurence cavitation inside lubricant films. viscosity occuring mixture oil air bubbles vastly different than that pure therefore changes pressure build‐up thereby stiffness damping properties lubrication To accurately predict a damper, its effect on has to be taken into account. Well known algorithms for problems, like Elrod algorithm or two‐phase‐model, neglect transient nature outgassing assume instantaneous bubble formation collapse. In presented paper, dynamics model based Rayleigh‐Plesset‐Scriven equation utilised instead rotordynamic behaviour turbocharger rotor examined fully multi body simulations.