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Control of rotordynamic instability in a typical gas turbine's power systemThe effect of rotor internal friction on the system's stability was studied when operated above the first critical speed. This internal friction is commonly caused by sliding press fits or sliding splines. Under conditions of high speed and low bearing damping, these systems will occassionally whirl at a frequency less than the shaft's rotational speed. This subsynchronous precession is a self excited phenomenon and stress reversals are created. This phenomenon was observed during engine testing. The reduction of spline friction and/or the inclusion of squeeze film damping have controlled the instability. Case history and the detail design of the squeeze film dampers is discussed.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Veikos, N. M.
(Avco Lycoming Div. Stratford, CT, United States)
Page, R. H.
(Avco Lycoming Div. Stratford, CT, United States)
Tornillo, E. J.
(Avco Lycoming Div. Stratford, CT, United States)
Date Acquired
August 12, 2013
Publication Date
December 1, 1984
Publication Information
Publication: NASA. Lewis Research Center Rotordynamic Instability Problems in High-Performance Turbomachinery
Subject Category
Mechanical Engineering
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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