Influence of Number and Arrange of Teeth on Performance of Labyrinth Seal

T. L. Jiang†‡*, Z. M. Xu‡, L. H. Cao‡, W. Xu‡, & Y. Li‡


†College of Energy and Mechanical Engineering, North China Electric Power University, Beijing 102206, China, 
‡College of Energy and Power Engineering, Northeast Dianli University, Jilin 132012, China
Cite this paper
T. L. Jiang, Z. M. Xu, L. H. Cao, W. Xu, & Y. Li , “Influence of Number and Arrange of Teeth on Performance of Labyrinth Seal”, Journal of Mechanical Engineering Research and Developments, vol. 39, no. 3, pp. 633-639, 2016. DOI: 10.7508/jmerd.2016.03.004

ABSTRACT: In this paper, the SIMPLE methods and the RNG k-ε turbulence model are employed to investigate the effects of seal number and arrangement of teeth on the discharge behavior of a typical labyrinth seal. The results show that the flow field vortex system structure in the sealed chamber of the labyrinth seal changes with the variation of the seal number when the length of labyrinth seal section is constant. With the increase of the seal number, the vortex becomes complex, while the seal effect becomes better. When the seal number is same and the length of labyrinth seal section is fixed, the structure with higher teeth in the front and lower teeth in the back should be applied in order to reduce the labyrinth packing gas leakage.

Keywords : Steam turbine; Labyrinth seal; Number of teeth; Arrange; Numerical simulation.

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