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TECHNICAL PAPERS: Gas Turbines: Heat Transfer

Measurement and Visualization of Leakage Effects of Rounded Teeth Tips and Rub-Grooves on Stepped Labyrinths

[+] Author and Article Information
D. L. Rhode, B. F. Allen

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

J. Eng. Gas Turbines Power 123(3), 604-611 (Aug 01, 2000) (8 pages) doi:10.1115/1.1377873 History: Received March 01, 1999; Revised August 01, 2000
Copyright © 2001 by ASME
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References

Figures

Grahic Jump Location
Leakage resistance coefficient versus Re; large clearance c=2.54 cm (1.0 in.) and large step height s=8.26 cm (3.25 in.)
Grahic Jump Location
Leakage resistance coefficient versus Re; large clearance c=2.54 cm (1.0 in.) and small step height s=4.45 cm (1.75 in.)
Grahic Jump Location
Cutaway view of the very large-scale test section showing the flow visualization windows
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Test seal for the grooved-worn-teeth case of small clearance c=0.064 cm (0.25 in.) and small step height s=4.45 cm (1.75 in.)
Grahic Jump Location
Leakage resistance coefficient versus Re; small clearance c=0.064 cm (0.25 in.) and large step height s=8.26 cm (3.25 in.)
Grahic Jump Location
Digital image of grooved-worn-teeth case; small clearance c=0.064 cm (0.25 in.) and large step height s=8.26 cm (3.25 in.)
Grahic Jump Location
Magnified digital image of grooved-worn-teeth tips; small clearance c=0.064 cm (0.25 in.) and large step height s=8.26 cm (3.25 in.)
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Magnified digital image of grooved-unworn-teeth tips; small clearance c=0.064 cm (0.25 in.) and large step height s=8.26 cm (3.25 in.)
Grahic Jump Location
Digital image of ungrooved-worn-teeth case; small clearance c=0.064 cm (0.25 in.) and large step height s=8.26 cm (3.25 in.)
Grahic Jump Location
Digital image of grooved-unworn-teeth case; small clearance c=0.064 cm (0.25 in.) and large step height s=8.26 cm (3.25 in.)
Grahic Jump Location
Leakage resistance coefficient versus Re; small clearance c=0.064 cm (0.25 in.) and small step height s=4.45 cm (1.75 in.)
Grahic Jump Location
Leakage resistance coefficient versus Re; medium clearance c=1.91 cm (0.75 in.) and large step height s=8.26 cm (3.25 in.)
Grahic Jump Location
Leakage resistance coefficient versus Re; medium clearance c=1.91 cm (0.75 in.) and small step height s=4.45 cm (1.75 in.)
Grahic Jump Location
Digital image of grooved-worn-teeth case; medium clearance c=1.91 cm (0.75 in.) and small step height s=4.45 cm (1.75 in.)

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