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Squeeze-Film Damper Technology: Part 1 — Prediction of Finite Length Damper Performance FREE

[+] Author Affiliations
J. W. Lund

University of Copenhagen, Denmark

A. J. Smalley

Southwest Research Institute, San Antonio, TX

J. A. Tecza, J. F. Walton

Mechanical Technology Incorporated, Latham, NY

Paper No. 83-GT-247, pp. V005T12A026; 8 pages
doi:10.1115/83-GT-247
From:
  • ASME 1983 International Gas Turbine Conference and Exhibit
  • Volume 5: Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; Process Industries
  • Phoenix, Arizona, USA, March 27–31, 1983
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7955-9
  • Copyright © 1983 by ASME

abstract

Squeeze-film dampers are commonly used in gas turbine engines and have been applied successfully in a great many new designs, and also as retrofits to older engines. Of the mechanical components in gas turbines, squeeze-film dampers are the least understood. Their behavior is nonlinear and strongly coupled to the dynamics of the rotor systems on which they are installed. The design of these dampers is still largely empirical, although they have been the subject of a large number of past investigations.

To describe recent analytical and experimental work in squeeze-film damper technology, two papers are planned. This abstract outlines the first paper, Part 1, which concerns itself with squeeze-film damper analysis. This paper will describe an analysis method and boundary conditions which have been developed recently for modelling dampers, and in particular, will cover the treatment of finite length, feed and drain holes and fluid inertia effects, the latter having been shown recently to be of great importance in predicting rotor system behavior. A computer program that solves the Reynolds equation for the above conditions will be described and sample calculation results presented.

Copyright © 1983 by ASME
Topics: Dampers
This article is only available in the PDF format.

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