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Film thickness measurement for spiral groove and Rayleigh step lift pad self-acting face sealsOne Rayleigh step lift pad and three spiral groove self-acting face seal configurations were tested to measure film thickness and frictional torque as a function of shaft speed. The seals were tested at a constant face load of 73 N (16.4 lb) with ambient air at room temperature and atmospheric pressure as the fluid medium. The test speed range was from 7000 to 17,000 rpm. The measured film thickness was compared with theoretical data from mathematical models. The mathematical models overpredicted the measured film thickness at the lower speeds of the test speed range and underpredicted the measured film thickness at the higher speeds of the test speed range.
Document ID
19830002856
Document Type
Technical Publication (TP)
Authors
Dirusso, E. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 4, 2013
Publication Date
October 1, 1982
Subject Category
AIRCRAFT PROPULSION AND POWER
Report/Patent Number
E-1169
NAS 1.60:2058
NASA-TP-2058
Funding Number(s)
PROJECT: RTOP 505-32-42
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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