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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Predicted Effects of Shunt Injection on the Rotordynamics of Gas Labyrinth Seals

[+] Author and Article Information
N. Kim

Weatherford International, Inc., Houston, TX

S.-Y. Park, D. L. Rhode

Mechanical Engineering Department, Texas A&M University, College Station, TX

J. Eng. Gas Turbines Power 125(1), 167-174 (Dec 27, 2002) (8 pages) doi:10.1115/1.1520539 History: Received December 01, 2000; Revised March 01, 2001; Online December 27, 2002
Copyright © 2003 by ASME
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References

Figures

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Geometrical representation of the Taylor series expansion of variable on the displaced rotor surface [Ω: whirling speed; ω: rotating speed]
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Axial distribution of the first-order pressure components
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Axial distribution of the first-order circumferential velocity components
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Axial distribution of the first-order axial velocity components
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Radial distribution of the first-order pressure components at injection location A (x/L=0.16)
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Radial distribution of the first-order circumferential velocity components at injection location A (x/L=0.16)
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Radial distribution of the first-order axial velocity components at injection location A (x/L=0.16)
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Variation of cross-coupled stiffness with pressure ratio for injection location A (x/L=0.16)
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Variation of cross-coupled stiffness with pressure ratio for injection location A (x/L=0.16)
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Variation of direct damping with pressure ratio for injection location A (x/L=0.16)
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Variation of direct damping with pressure ratio for injection location A (x/L=0.16)
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Variation of effective damping with pressure ratio for injection location A (x/L=0.16)
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Variation of cross-coupled stiffness with shunt injection location
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Variation of direct damping with shunt injection location
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Variation of effective damping with shunt injection location
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Geometrical and kinematical relationship in a whirling rotor, [Ω: whirling speed; ω: rotating speed]
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Injection labyrinth seal configuration (not to scale). [Tooth clearance=0.22 mm (0.00866 in.); tooth height=3.175 mm (0.125 in.); tooth pitch=3.175 mm (0.125 in.); seal length=63.5 mm (2.5 in.); shaft radius=64.69 mm (2.54684 in.)], [Injection Location A: x/L=0.16; B: x/L=0.26; C: x/L=0.37].

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