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Dynamic Stiffness and Damping of Foil Bearings for Gas Turbine Engines
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English
Abstract
Foil bearings have been used since the 1970s in low temperature (600F) applications. However, adapting this type of hydrodynamic air bearing to the high temperature (1 200F) environment of gas turbine engines has been slow, due to suspected low damping values. Foil bearings develop mechanical interactions, thought to generate coulomb damping, which affects the dynamic characteristics - dynamic stiffness and damping, the primary factors influencing dynamic stability of rotor-bearing systems - of such a bearing. This paper reports on a program of experiments to identify the design parameters affecting foil bearing dynamics. A fractional factorial technique characterized the effects of the primary independent design parameters and their interactions. Results are presented for eight test bearings, with an analysis of variance used to determine the optimum configuration and show how it can improve the stability of a typical gas turbine engine.
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Citation
Meacham, W., Fred Klaass, R., Dayton, R., and Durkin, E., "Dynamic Stiffness and Damping of Foil Bearings for Gas Turbine Engines," SAE Technical Paper 931449, 1993, https://doi.org/10.4271/931449.Also In
References
- Bangs, Scholer Foil bearings help air passengers keep their cool Power Transmission Design February 1973
- Agrawal, G.L. Foil Gas Bearings for Turbomachinery SAE Paper Number 901236 July 9 12 1990
- Suriano, F.J. Dayton, RD Woessner, FG Test Experience with Turbine-End Foil Bearing Equipped Gas Turbine Engines ASME Paper 83-GT-73 March 1983
- Suriano, F.J. APPLICATION OF FOIL BEARINGS TO TURBINE-END OF GAS TURBINE ENGINES Paper presented at the 19th Joint Propulsion Conference Seattle, Washington June 27 1983
- Hooshang; Heshmat James F. Walton, Advanced Multi-Squeeze Film Dampers for Rotor Vibration Control Tribology Transaction 34 1991 489 496
- Adams, M.L. Test Facility at Case-Western Reserve University, Dynamic Coefficients of Journal Bearings; Fluid Film Research and Development Proceedings Case-Western Reserve University 1991 No paper published at this time