The honeycomb seal shows promising characteristics in many turbine machines for the leakage control and rotor stability enhancement. However, the cost of honeycomb seal is relative high due to its complexities in manufacture and installation process. The hole-pattern seal has a very close leakage and rotordynamic performance with honeycomb seal, and also the manufacture and installation of hole-pattern seal are easier than the honeycomb seal, which attract the researchers and designers in recent years. In the published literature, there have been many papers dealt with the rotordynamic coefficients measurements, but very few researchers concentrated on the leakage control performance for the labyrinth seal with hole-pattern land. In this paper, the experimental tests were carried out to obtain the leakage rates versus pressure ratios at four clearances for the straight-through labyrinth seal with smooth stator, straight-through labyrinth seal with hole-pattern stator, stepped labyrinth seal with smooth stator and the stepped labyrinth seal with hole-pattern stator. The flow fields in the seal chambers were also visualized at different clearances and pressure ratios. Moreover, the CFD tool was also implemented to predict the leakage performance in labyrinth seals, and the numerical results were compared with the measurements. The results show that, the stepped labyrinth seal with hole-pattern land performs better leakage control characteristic than the straight-through labyrinth seal with hole-pattern land, and the stepped labyrinth seal with smooth land performs better leakage control than the straight through labyrinth seal with smooth land. For the stepped labyrinth seal, holes in the stator increase the effective clearance thus increase the leakage rate in seal. However, the straight-through labyrinth seal with hole-pattern land almost has the identical leakage performance with the smooth configuration.
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ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition
June 11–15, 2018
Oslo, Norway
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5109-8
PROCEEDINGS PAPER
Influence of Hole-Pattern Stator on Leakage Performance of Labyrinth Seals
Xinbo Dai,
Xinbo Dai
Xi'an Jiaotong University, Xi'an, China
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Kang Zhang,
Kang Zhang
Xi'an Jiaotong University, Xi'an, China
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Kun He
Kun He
Xi'an Jiaotong University, Xi'an, China
Search for other works by this author on:
Xin Yan
Xi'an Jiaotong University, Xi'an, China
Xinbo Dai
Xi'an Jiaotong University, Xi'an, China
Kang Zhang
Xi'an Jiaotong University, Xi'an, China
Jun Li
Xi'an Jiaotong University, Xi'an, China
Kun He
Xi'an Jiaotong University, Xi'an, China
Paper No:
GT2018-75349, V05BT15A013; 9 pages
Published Online:
August 30, 2018
Citation
Yan, X, Dai, X, Zhang, K, Li, J, & He, K. "Influence of Hole-Pattern Stator on Leakage Performance of Labyrinth Seals." Proceedings of the ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. Volume 5B: Heat Transfer. Oslo, Norway. June 11–15, 2018. V05BT15A013. ASME. https://doi.org/10.1115/GT2018-75349
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