ABSTRACT
The elastic ring squeeze film damper (ERSFD) shows superior performance in vibration control than traditional squeeze film damper (SFD), it has been used in aero-engine and has potential application on gas turbine and centrifuge. Based on the Mixture theory, an unsteady gas-liquid two phase flow model of inner and outer oil films of ERSFD is established in ANSYS Fluent to investigate the influence of cavitation. The dynamic mesh technique is used to calculate the oil film pressure and vapor volume fraction under different precession radius and frequencies. The results reveal that there is cavitation phenomenon in the low-pressure zone of inner and outer oil film. Because tangential squeezing effect of the journal precession is weaked by the division of the boss of the elastic ring, the negative pressure area and the vapor volume fraction calculated by the cavitation model is bigger than that of full-film model. Vapor volume fraction of an open end damper increase with the increase of precession radius and frequency.
