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research-article

Conditions of lift-off and film thickness in squeeze film levitation

[+] Author and Article Information
Noel Brunetiere

Institut Pprime, CNRS, Université de Poitiers, Ensma, Futuroscope, France
noel.brunetiere@univ-poitiers.fr

Antoinette Blouin

Institut Pprime, CNRS, Université de Poitiers, Ensma, Futuroscope, France
yantoinette.blouin@univ-poitiers.fr

Guytri Kastane

Institut Pprime, CNRS, Université de Poitiers, Ensma, Futuroscope, France
zliane.kastane.tchikaya@univ-poitiers.fr

1Corresponding author.

ASME doi:10.1115/1.4038805 History: Received October 09, 2017; Revised December 10, 2017

Abstract

An experimental test rig has been used to analyze the lift-off condition of a squeeze film thrust bearing. It is composed of a vibrating flat plate linked to a piezo-actuator, a cylindrical mass, and two displacement sensors. The frequency and magnitude of oscillation are varied as well as the mass of the solid, to identify the lift-off conditions. The experimental results are compared to numerical simulations. The model solves the transient compressible Reynolds equation coupled with Newton's law for the levitated mass. The model is then used to extend the experimental results to other operating conditions. A dimensionless analysis of the results is performed to study the lift-off conditions and the average film thickness during levitation.

Copyright (c) 2017 by ASME
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