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Flow Induced Spring Coefficients of Labyrinth Seals for Application in Rotor DynamicsFlow induced aerodynamic spring coefficients of labyrinth seals are discussed and the restoring force in the deflection plane of the rotor and the lateral force acting perpendicularly to it are also considered. The effects of operational conditions on the spring characteristics of these components are examined, such as differential pressure, speed, inlet flow conditions, and the geometry of the labyrinth seals. Estimation formulas for the lateral forces due to shaft rotation and inlet swirl, which are developed through experiments, are presented. The utilization of the investigations is explained and results of stability calculations, especially for high pressure centrifugal compressors, are added. Suggestions are made concerning the avoidance of exciting forces in labyrinths.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Benckert, H.
(Stuttgart Univ.)
Wachter, J.
(Stuttgart Univ.)
Date Acquired
August 10, 2013
Publication Date
January 1, 1980
Publication Information
Publication: NASA. Lewis Res. Center Rotodyn. Instability Probl. in High-Performance Turbomachinery
Subject Category
Mechanical Engineering
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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