The instability caused by the fluid leakage leads to a limited performance of turbomachines. This instability may be improved by using flexible bearing supports with anisotropic stiffness. With a simplified model this effect is investigated including the influence of many parameters. The results show that the optimum range of anisotropy is strongly dependent on the parameters of rotor-bearing systems. In this paper an explanation from an energy point of view is presented to clarify the different stability behaviors with anisotropic bearing supports. Beside the simplified model, the stability of the complex rotor-bearing system with anisotropic bearing supports is investigated by the finite element model. An example of a typical 900 MW turbogenerator system is presented.
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January 1989
This article was originally published in
Journal of Vibration, Acoustics, Stress, and Reliability in Design
Research Papers
Instability Due to Fluid Leakage of a Rotor System With Anisotropic Support
J. H. Wang,
J. H. Wang
Department of Power Mechanical Engineering, National Tsing-Hua University, Hsinchu, Taiwan 30043, R.O.C.
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M. T. Tsai
M. T. Tsai
Department of Power Mechanical Engineering, National Tsing-Hua University, Hsinchu, Taiwan 30043, R.O.C.
Search for other works by this author on:
J. H. Wang
Department of Power Mechanical Engineering, National Tsing-Hua University, Hsinchu, Taiwan 30043, R.O.C.
M. T. Tsai
Department of Power Mechanical Engineering, National Tsing-Hua University, Hsinchu, Taiwan 30043, R.O.C.
J. Vib., Acoust., Stress, and Reliab. Jan 1989, 111(1): 27-34 (8 pages)
Published Online: January 1, 1989
Article history
Received:
June 12, 1987
Online:
November 23, 2009
Citation
Wang, J. H., and Tsai, M. T. (January 1, 1989). "Instability Due to Fluid Leakage of a Rotor System With Anisotropic Support." ASME. J. Vib., Acoust., Stress, and Reliab. January 1989; 111(1): 27–34. https://doi.org/10.1115/1.3269819
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