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 Power Engineering, Northeast Dianli University, Jilin 132012, China
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.
 H. Cai, B. Zhu, and H. D. Jiang, “Numerical study about the main influence of seal leakage flow on turbine blade path”, J Eng Thermophys-Rus, vol. 22, no. 3, pp. 290-293, 2001.
 X. K. Tian and R. Y. Zhao, “Energy network flow model and optimization based on energy hub for big harbor industrial park”, Journal of Coastal Research: Special Issue 73, pp. 298-303.
 Q. Cui, Z. H. Zhang, and Y. Zhou, “Experimental study of turbine gland leakage”, Thermal Turbine, vol 39, no.1, pp. 26-30, 2010.
 Y. J. Zhu, R. Dai, and Q. Y. Sai, “Function and design of splitter blades in low-speed compressor cascade”, J Eng Thermophys-Rus, vol 35, no. 12, pp. 2402-2405, 2014.
 Q. Cui, Z. H. Zhang, and W. K. Liu, “Test research of the leakage performance in steam seal”, in ASME 2011 Power Conference Collocated with Jsme Icope, 2011, pp. 727-732.
 L. Y. Jiang, W. K. Liu, and Z. H. Zhang, “Comparing sealing properties of stage gears, honeycomb gland sealing and cellular-type damping gland sealing”, Journal of Power Engineering, vol. 32, no. 7, pp. 508-512, 2012.
 L. H. Cao, P. F. Hu, and W. Xu, “Numerical simulation of inner flow filed for dynamic-static gland sealing”, Chemical Machinery, vol. 37, no. 5, pp. 617-621, 2010.
 Z. H. Zhang, F. Fan, K. X. Wang, and B. Franciosa, “Analysis on seismic performance of centrically braced steel frame”, Journal of Mechanical Engineering Research and Developments, vol. 39, no. 2, pp. 308-314, 2016.
 Z. X. Luan, Y. Li, and Y. G. Xue, “Numerical study on secondary flow losses of stationary turbine cascade”, Journal of Northeast Dianli University, vol. 32, no. 2, pp. 43-47, 2012.
 J. Ahmed, M. Gamal, and M. John, “Labyrinth seal leakage tests: Gear profile, gear thickness, and eccentricity effects”, ASME Journal of Engineering for Gas Turbines and Power, vol. 130, pp. 012510.1-012510.11, 2008.
 Z. G. Li, J. Li, and Z. P. Feng, “Study on influence factors of labyrinth sealing leakage properties”, Journal of Xi’an Jiaotong University, vol. 44, no.3, pp.16-22, 2010.
 J. Zhang and H. Kazerooni, “Consideration on the building of urban landscape sports culture”, Journal of Mechanical Engineering Research and Developments, vol. 39, no. 1, pp. 83-87, 2016.
 Z. J. Hou, Z. Q. Lu, J. Z. Liang, C. Chen, and Y. Xu, “A healthy monitor system for fall and balance detection of elderly”, vol. 39, no. 2, pp. 364-372, 2016.
 H. Hui, Z. L. Liu, and H. B. Liu, “The Coordination Analysis of the Energy Consumption, Economy Growth, and Environment Protection in China”, EBM 2010: International Conference on Engineering and Business Management, vol. 1-8, pp. 5596-5599.