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Experimental results for labyrinth gas seals with honeycomb stators - Comparisons to smooth-stator seals and theoretical predictionsExperimental measurements are presented for the rotordynamic stiffness and damping coefficients of a teeth-on-rotor labyrinth seal with a honeycomb stator. Inlet circumferential velocity, inlet pressure, rotor speed, and seal clearance are primary variables. Results are compared to data for teeth-on-rotor labyrinth seals with smooth stators and to analytical predictions from a two-control-volume compressible flow model. The experimental results show that the honeycomb-stator configuration is more stable than the smooth-stator configuration at low rator speeds. At high rotor speeds, the stator surface does not affect stability. The theoretical model predicts the cross-coupled stiffness of the honeycomb-stator seal correctly within 25 percent of measured values. The model provides accurate predictions of direct damping for large clearance seals; however, the model predictions and test results diverge with increasing running speed. Overall, the model does not perform as well for low clearance seals as for high clearance seals.
Document ID
19890037621
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hawkins, Larry
(Rockwell International Corp. Rocketdyne Div., Canoga Park, CA, United States)
Childs, Dara
(Rockwell International Corp. Canoga Park, CA, United States)
Hale, Keith
(Texas A & M University College Station, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Publication Information
Publication: ASME, Transactions, Journal of Tribology
Volume: 111
ISSN: 0742-4787
Subject Category
Mechanical Engineering
Report/Patent Number
ASME PAPER 88-TRIB-40
Accession Number
89A24992
Funding Number(s)
CONTRACT_GRANT: F49620-82-K-0033
CONTRACT_GRANT: NAG3-181
Distribution Limits
Public
Copyright
Other

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