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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 mixture is implied and demonstrated.
Document ID
19790019289
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hendricks, R. C. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
January 1, 1979
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
E-064
NASA-TM-79192
Meeting Information
Meeting: Joint Lubrication Conf.
Location: Dayton, OH
Country: United States
Start Date: October 16, 1979
End Date: October 18, 1979
Sponsors: ASME, Am. Soc. of Lubrication Engr.
Accession Number
79N27460
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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