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Some flow characteristics of conventional and tapered high-pressure-drop simulated sealsThe leak rates through shaft seals with large pressure drops were simulated using gaseous hydrogen, or nitrogen flowing through an annulus with a nonrotating centerbody. The flows were choked. For concentric or eccentric position of the rotor and parallel or convergent tapered flow passages, data and analysis revealed that mass flux or leak rate can be determined from a relation whose normalizing parameters depend on the thermodynamic critical constants of the working fluid and an average flow area expressed in terms of the inlet and exit cross-sectional areas. Using these normalized relations, the flow data for parallel and three convergent, tapered, shaft-seal configurations are in good agreement. Generalization to any simple gas or gas mixtures is implied and demonstrated in part.
Document ID
19800030557
Document Type
Conference Paper
Authors
Hendricks, R. C. (NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 10, 2013
Publication Date
October 1, 1979
Subject Category
MECHANICAL ENGINEERING
Report/Patent Number
ASLE PREPRINT 79-LC-3B-2
Meeting Information
Lubrication Conference(Dayton, OH)
Distribution Limits
Public
Copyright
Other