Threshold Performance Optimization of a Rotor-Bearing System Subjected to Leakage Excitation

[+] Author and Article Information
J. H. Wang, F. M. Shih

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

J. Eng. Gas Turbines Power 112(4), 439-444 (Oct 01, 1990) (6 pages) doi:10.1115/1.2906187 History: Received January 24, 1989; Online April 24, 2008


Fluid leakage in blade tips in turbomachinery may induce instability and limit and output rating. In this work, the optimization technique has been used to find diameters of shaft elements and bearing supports so that the optimized rotor-bearing system can sustain a larger fluid leakage force. The results show that the threshold performance of rotor-bearing systems can be significantly improved by slight modifications of the shaft diameters. The results also indicate that the threshold performance can be improved more significantly by the combination of optimum bearing supports and optimum shaft diameters.

Copyright © 1990 by The American Society of Mechanical Engineers
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