Experimental 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 (a) data for teeth-on-rotor labyrinth seals with smooth stators, and (b) 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 rotor 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.
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January 1989
Research Papers
Experimental Results for Labyrinth Gas Seals With Honeycomb Stators: Comparisons to Smooth-Stator Seals and Theoretical Predictions
Larry Hawkins,
Larry Hawkins
Rocketdyne Division, Rockwell International, Canoga Park, CA 91304
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Dara Childs,
Dara Childs
Texas A/M University, College Station, Texas 77843
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Keith Hale
Keith Hale
Texas A/M University, College Station, Texas 77843
Search for other works by this author on:
Larry Hawkins
Rocketdyne Division, Rockwell International, Canoga Park, CA 91304
Dara Childs
Texas A/M University, College Station, Texas 77843
Keith Hale
Texas A/M University, College Station, Texas 77843
J. Tribol. Jan 1989, 111(1): 161-168 (8 pages)
Published Online: January 1, 1989
Article history
Received:
February 26, 1988
Online:
October 29, 2009
Citation
Hawkins, L., Childs, D., and Hale, K. (January 1, 1989). "Experimental Results for Labyrinth Gas Seals With Honeycomb Stators: Comparisons to Smooth-Stator Seals and Theoretical Predictions." ASME. J. Tribol. January 1989; 111(1): 161–168. https://doi.org/10.1115/1.3261867
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