EVALUATION OF RAYLEIGH PLESSET - BASED CAVITATION MODELS FOR SQUEEZE FILM DAMPERS

摘要

This work is intended to evaluate a cavitation model based on the complete Rayleigh Plesset (RP) equation for use in squeeze film damper (SFD) calculations. The RP equation governs the variation of the radius of the cavitation bubbles at rest, surrounded by an infinite incompressible fluid and subject to an external pressure. This equation is obtained from the momentum equation and it takes into account the ensemble of the phenomena related to the dynamics of the bubbles (surface tension, damping, inertia). All the terms in the RP equation will be taken into account in the present work. Numerical results will be compared with experimental data obtained by Adiletta and Pietra [1]. The results then underline the influence of the effects contained in the RP equation on the pressure field.