An analytical model for open-ended squeeze film damper with a circumferential central groove

Author:

Fan Tieshu1ORCID,Behdinan Kamran1

Affiliation:

1. Department of Mechanical and Industrial Engineering, Faculty of Applied Science and Engineering, University of Toronto, Canada

Abstract

In this paper, the effect of a circumferential central groove on an open-ended squeeze film damper is analytically investigated. Flow equations in both the central groove and film land are solved by applying the technique of separation of variables. Model validation is presented by a rotor-squeeze film damper test rig using a recorded squeeze film damper film pressure, where a significant improvement from a classical squeeze film damper model is shown. It is found that the central groove has a high and stable pressure region while neglecting the groove effect that would over-estimate the damping force. Both simulation and experiment show that the increase of supply flow escalates the damper pressure and it could possibly avoid the film cavitation, thus raising the squeeze film damper reaction force. In addition, the effects of different groove cross-section shapes including rectangle, square, semi-circle, and semi-ellipse are evaluated. Model sensitivity shows that the size of the central groove has more impact on the damper performance than the shape of the groove.

Publisher

SAGE Publications

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering

Reference26 articles.

1. Zeidan FY, San Andres L, Vance JM. Design and application of squeeze film dampers in rotating machinery. In: Proceedings of the twenty-fifth turbomachinary symposium, 1996, p.20.

2. Design and modeling of a novel active squeeze film damper

3. Improved identification of squeeze-film damper models for aeroengine vibration analysis

4. Forced responses analysis of a rotor system with squeeze film damper during flight maneuvers using finite element method

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