KEYWORDS

Squeeze Film Dampers, Volume of Fluid Method

A VOLUME OF FLUID METHOD FOR AIR INGESTION IN SQUEEZE FILM DAMPERS

This work proposes a numerical model for SFD operating simultaneously with vapor cavitation and air ingestion. The pressure is given by the Reynolds equation. The vapor cavitation model is based on Rayleigh-Plesset equation and was previously presented in the context of the bulk flow equations. Air ingestion is dealt with by using a volume of fluid CFD method never used in Lubrication up to now. The original method was adapted for capturing and tracking the free boundary between air and the lubricant. Numerical results are compared with experimental data obtained by Adiletta and Pietra. Vapor cavitation and air ingestion appear as constant pressure zones. The vapor threshold is located on the low pressure area and represents the lowest pressure value in the SFD, usually close to absolute zero. 

AUTHORS

Jérôme Gehannin, Mihai Arghir and Olivier Bonneau, Institut PPRIME, Université de Poitiers, Futuroscope, Chasseneuil, France