Labyrinth Seal Force Coefficients for Small Motion of the Rotor About an Arbitrary Eccentricity Position

C. Rajakumar, F. Sisto

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Labyrinth seal force coefficients have been calculated for arbitrary eccentricity position of the rotor center with respect to the seal center. By solving the steady seal flow governing equations for known eccentricities, the circumferential pressure and velocity distributions are obtained. For a perturbation motion of the rotor about the steady eccentric position, the momentum and continuity equations of the seal flow are linearized. The resulting linear partial differential equations have been solved to get the perturbation pressures that are proportional to the rotor center motion along two orthogonal coordinate directions, which when integrated over the rotor surface yield the required force coefficients. Comparison of the stiffness coefficients obtained were made with published experimental results. In addition, the stiffness coefficients have been verified by comparing with the seal forces calculated for large eccentricity ratios. The results also include the damping coefficients that result due to the rotor center motion.

Original languageEnglish
Title of host publicationManufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Process Industries; General
ISBN (Electronic)9780791879276
DOIs
StatePublished - 1987
EventASME 1987 International Gas Turbine Conference and Exhibition, GT 1987 - Anaheim, United States
Duration: 31 May 19874 Jun 1987

Publication series

NameProceedings of the ASME Turbo Expo
Volume5

Conference

ConferenceASME 1987 International Gas Turbine Conference and Exhibition, GT 1987
Country/TerritoryUnited States
CityAnaheim
Period31/05/874/06/87

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