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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Measurements Versus Predictions for the Dynamic Impedance of Annular Gas Seals—Part II: Smooth and Honeycomb Geometries

[+] Author and Article Information
M. P. Dawson

Pratt and Whitney, 400 Main Street, M/S 162-20, East Hartford, CT 06108

D. W. Childs

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

J. Eng. Gas Turbines Power 124(4), 963-970 (Sep 24, 2002) (8 pages) doi:10.1115/1.1478076 History: Received December 01, 2000; Revised March 01, 2001; Online September 24, 2002
Copyright © 2002 by ASME
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References

Figures

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Two-control-volume model: cross sections of honeycomb seal stator and rotor
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Nondimensional radial impedance predictions
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Nondimensional tangential impedance predictions
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Measured real and imaginary components of direct D(jΩ) and cross-coupled E(jΩ) impedance versus frequency at HS, HP, and 40% pressure ratio for smooth and honeycomb seals
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Experimental effectiveness stiffness Keff and effective damping Ceff versus frequency at HS, HP, and 40% pressure ratio
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Experimental and theoretical real and imaginary components of direct D(jΩ) and cross-coupled E(jΩ) impedance versus frequency at HS, HP, and 50% pressure ratio for the honeycomb seals
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Experimental and theoretical effective stiffness Keff and damping Ceff versus frequency at HS, HP, and 50% pressure ratio for the honeycomb seals
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Honeycomb annual seal and rotating shaft

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