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Prediction of force coefficients for labyrinth sealsThe development of a linear model for the prediction of labyrinth seal forces and on its comparison to available stiffness data is presented. A discussion of the relevance of fluid damping forces and the preliminary stages of a program to obtain data on these forces are examined. Fluid-dynamic forces arising from nonuniform pressure patterns in labyrinth seal glands are known to be potentially destablizing in high power turbomachinery. A well documented case in point is that of the space Shuttle Main Engine turbopumps. Seal forces are also an important factor for the stability of shrouded turbines, acting in that case in conjunction with the effects of blade-tip clearance variations.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Lee, O. W. K.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Martinez-Sanchez, M.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Czajkowski, E.
(Massachusetts Inst. of Tech. Cambridge, MA, 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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