The Effect of Anisotropic Support on Rotor Instability Due to Fluid Leakage

[+] Author and Article Information
Jhy-Horng Wang, Ming-Te Tsai

Department of Power Mechanical Engineering, National Tsing-Hua University, Hsinchu, Taiwan 30043

J. Eng. Gas Turbines Power 110(4), 585-591 (Oct 01, 1988) (7 pages) doi:10.1115/1.3240175 History: Received December 05, 1987; Online October 15, 2009


The instability caused by fluid leakage leads to limited performance in 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 anistropy is strongly dependent on the parameters of the rotor-bearing system. In this paper an explanation from an energy point of view is presented to clarify the different stability behaviors with anisotropic bearing support.

Copyright © 1988 by ASME
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