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An annular gas seal analysis using empirical entrance and exit region friction factorsWall shear stress results from stationary-rotor flow tests of five annular gas seals are used to develop entrance and exit region friction factor models. The friction factor models are used in a bulk-flow seal analysis which predicts leakage and rotor-dynamic coefficients. The predictions of the analysis are compared to experimental results and to the predictions of Nelson's analysis (1985). The comparisons are for smooth-rotor seals with smooth and honeycomb-stators. The present analysis predicts the destabilizing cross-coupled stiffness of a seal better than Nelson's analysis. Both analyses predict direct damping well and direct stiffness poorly.
Document ID
19900046500
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Elrod, D. A.
(Virginia Polytechnic Institute and State University Blacksburg, United States)
Childs, D. W.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Nelson, C. C.
(Texas A & M University College Station, United States)
Date Acquired
August 14, 2013
Publication Date
April 1, 1990
Publication Information
Publication: ASME, Transactions, Journal of Tribology
Volume: 112
ISSN: 0742-4787
Subject Category
Mechanical Engineering
Report/Patent Number
ASME PAPER 89-TRIB-46
Accession Number
90A33555
Funding Number(s)
CONTRACT_GRANT: NAG3-181
Distribution Limits
Public
Copyright
Other

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