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TECHNICAL PAPERS: Gas Turbines: Heat Transfer and Turbomachinery

Development of a Two-Dimensional Computational Fluid Dynamics Approach for Computing Three-Dimensional Honeycomb Labyrinth Leakage

[+] Author and Article Information
Dong-Chun Choi, David L. Rhode

Mechanical Engineering Department, Texas A&M University, College Station, TX 77843

J. Eng. Gas Turbines Power 126(4), 794-802 (Nov 24, 2004) (9 pages) doi:10.1115/1.1772405 History: Received October 01, 2002; Revised March 01, 2003; Online November 24, 2004
Copyright © 2004 by ASME
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References

Figures

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Configuration and nomenclature of the stepped labyrinth considered (C/TT=0.20, 0.33, 0.50, DTF1/TT=0.57–1.05, DTF2/TT=1.05, 2.10, S/TT=2.67, DTC/TT=2.50, 5.83, 9.17, TP/TT=11.67, TT=0.762 mm)
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Test section of the two-dimensional experimental facility
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Honeycomb configuration for (a) the actual hexagonal honeycomb hardware and (b) the new two-dimensional axisymmetric approximation of the actual hexagonal honeycomb
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Representative grid showing the two-dimensional axisymmetric approximate honeycomb fins
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Leakage solutions found in determining the DTF1 value for the two-dimensional axisymmetric CFD approach for Pup=378 kPa
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Leakage solutions found in determining the DTF1 value for the higher upstream pressure of Pup=601 kPa
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Recommended values of DTF1 for application of the new two-dimensional CFD approach
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Capability demonstration of the new two-dimensional CFD approach for various clearances and DTC=4.4 mm with Pup=378 kPa and Pdn=127 kPa
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Flow pattern example for a case where the two-dimensional axisymmetric honeycomb fin is not axially aligned with the tooth
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Capability demonstration of the new two-dimensional CFD approach for various clearances and DTC=4.4 mm with Pup=378 kPa and Pdn=251 kPa
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Capability demonstration of the new two-dimensional CFD approach for various DTC values and C=0.15 mm with Pup=378 kPa and Pdn=127 kPa
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Capability demonstration of the new two-dimensional CFD approach for various DTC values and C=0.25 mm with Pup=378 kPa and Pdn=127 kPa
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Capability demonstration of the new two-dimensional CFD approach for various DTC values and C=0.38 mm with Pup=378 kPa and Pdn=127 kPa
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Capability demonstration of the new two-dimensional CFD approach for various values of DTC and clearance with Pup=601 kPa and Pdn=202 kPa
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Capability demonstration of the new two-dimensional CFD approach for various values of DTC and clearance with Pup=601 kPa and Pdn=302 kPa
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Flow pattern example for a case where the two-dimensional axisymmetric honeycomb fin is axially aligned with the tooth DTC=4.4 mm
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Flow pattern example for a case where the two-dimensional axisymmetric honeycomb fin is axially aligned with the tooth and DTC=1.9 mm

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