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TECHNICAL PAPERS

Rotordynamic-Coefficient and Leakage Characteristics for Hole-Pattern-Stator Annular Gas Seals—Measurements Versus Predictions

[+] Author and Article Information
Dara W. Childs, Jonathan Wade

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

J. Tribol 126(2), 326-333 (Apr 19, 2004) (8 pages) doi:10.1115/1.1611502 History: Received February 20, 2003; Revised July 18, 2003; Online April 19, 2004
Copyright © 2004 by ASME
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References

Figures

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Frequency dependent plot of KXX,KXY,CXX,CXY versus excitation frequency Ω for Cr=0.10 mm, ω=20,200 rpm, u0(0)=0.303, and PR=0.47
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Cross-coupled stiffness coefficient k(Ω) for Cr=0.10 mm, ω=20,200 rpm, and PR=0.45 for u0(0)=0.303, 0.191, and 0.156
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Cross-coupled stiffness coefficient k(Ω) for Cr=0.20 mm, ω=20,200 rpm, and PR=0.49 for u0(0)=0.598, 0.304, and 0.028
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Effective damping coefficient Ceff(Ω) for Cr=0.20 mm, ω=20,200 rpm, and PR=0.49 for u0(0)=0.598, 0.304, and 0.028
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Keff and keff for the two clearances with no preswirl ω=20,200 rpm, and PR=0.49
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Cross-sectional view of the test rig
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Pitot tube location and preswirl rings
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Geometry of the hole pattern
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Frequency dependent plot of KXX,KXY,CXX,CXY versus excitation frequency Ω for Cr=0.20 mm, ω=20,200 rpm, u0(0)=0.598, and PR=0.49
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Frequency dependent plot of KXX,KXY,CXX,CXY versus excitation frequency Ω for Cr=0.20 mm, ω0=20,200 rpm, u0(0)=0.028, and PR=0.45

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