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TECHNICAL PAPERS

Theory Versus Experiment for the Rotordynamic Impedances of Two Hole-Pattern-Stator Gas Annular Seals

[+] Author and Article Information
Christopher G. Holt, Dara W. Childs

Turbomachinery Laboratory, Texas A&M University, College Station, TX 77843-3123

J. Tribol 124(1), 137-143 (Jun 05, 2001) (7 pages) doi:10.1115/1.1398297 History: Received February 20, 2001; Revised June 05, 2001
Copyright © 2002 by ASME
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References

Figures

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Compressor seal arrangements (eye-packing, interstage, balance-piston) Childs 1
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Hole-pattern, honeycomb, and labyrinth geometry
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Control volume locations within seal/rotor assembly
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Annular gas seal test stand
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Impedances (D and E) HS, LP, and 40 percent PR
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Impedances (D and E) HS, MP, and 40 percent PR
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Impedances (D and E) HS, HP, and 40 percent PR
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Effective stiffness and damping HS, LP, and 40 percent PR
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Effective stiffness and damping HS, MP, and 40 percent PR
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Effective stiffness and damping HS, HP, and 40 percent PR
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Effective stiffness and damping versus pressure ratio of 2.03 mm seal at HS and HP
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Effective stiffness and damping comparison between 2.03 mm seal, 3.18 mm seal, and 3.10 mm cell depth honeycomb seal at HS, MP, and 40 percent PR
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Measured versus predicited impedances for 2.03 mm hole-depth seal at LS, HP, and 40 percent pressure ratio
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Measured versus predicted impedances for the 3.18 mm seal, LS, HP, 40 percent PR
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Experiment vs. prediction, effective stiffness and damping of 2.03 mm hole-pattern seal at LS, HP, and 40 percent PR
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Experiment vs. prediction, effective stiffness and damping of 3.18 mm hole-depth seal at LS, HP, and 40 percent PR

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