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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Comparison of the Dynamic Characteristics of Smooth Annular Seals and Damping Seals

[+] Author and Article Information
J. M. Darden, E. M. Earhart

NASA Marshall Space Flight Center, TD55, Building 4203, MSFC, AL 35812

G. T. Flowers

Department of Mechanical Engineering, Auburn University, Auburn University, AL 36849-5341

J. Eng. Gas Turbines Power 123(4), 857-863 (Mar 01, 1999) (7 pages) doi:10.1115/1.1383256 History: Received October 01, 1998; Revised March 01, 1999
Copyright © 2001 by ASME
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References

Figures

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Cut-away view of test rig
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Top view of the test section
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Stiffness comparison for the low seal pressure differential case: solid=experimental direct stiffness, dash-dot=theoretical direct stiffness, dot=experimental cross-coupled stiffness, dash=theoretical cross-coupled stiffness
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Damping and whirl frequency ratio comparison for the low seal pressure differential case: solid=experimental direct damping, dash-dot=theoretical direct damping, dot=experimental whirl frequency ratio, dash=theoretical whirl frequency ratio
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Stiffness comparison for the high seal pressure differential case: solid=experimental direct stiffness, dash-dot=theoretical direct stiffness, dot=experimental cross-coupled stiffness, dash=theoretical cross-coupled stiffness
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Damping and whirl frequency ratio comparison for the high seal pressure differential case: solid=experimental direct damping, dash-dot=theoretical direct damping, dot=experimental whirl frequency ratio, dash=theoretical whirl frequency ratio

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