Aerodynamics Performance for Stepped Labyrinth Seals for Gas Turbine Applications
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This paper presents the leakage performance of various stepped labyrinth seals. A stationary seal test rig was set up and the leakage characteristics of three seal  configurations with different numbers of steps and teeth were investigated for wide operating ranges in terms of pressure ratio and tip clearance. Both the solid and honeycomb land structures were tested. In the honeycomb case, two different sizes were used. The seal was shaped, typical of labyrinth seals for gas turbine applications. The influences of seal configuration, and clearance and honeycomb sizes on the leakage performance were investigated. The relative performances between different seal configurations were compared and their dependence on the land structure was investigated. The honeycomb structure was found to increase leakage for all test conditions. The leakage ratio (honeycomb/solid) was analyzed in terms of geometric variables.

Author Name: 
Y. Kang
T. S. Kim
S. Y. Kang
H.K. Moon
Industries: 
Products: 
Conference Location: 
Glasgow, UK
Rights: 
2010 ASME
Pages: 
1191-1199
Conference Date: 
Saturday, June 14, 2008
Paper Reference: 
GT2010-23256
Volume: 
4
ISBN: 
978-0-7918-4399-4
DOI: 
http://dx.doi.org/10.1115/GT2010-23256
Conference Name: 
ASME Turbo Expo 2010: Power for Land, Sea and Air