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Remaining Technical Challenges and Future Plans for Oil-Free TurbomachineryThe application of Oil-Free technologies (foil gas bearings, solid lubricants and advanced analysis and predictive modeling tools) to advanced turbomachinery has been underway for several decades. During that time, full commercialization has occurred in aircraft air cycle machines, turbocompressors and cryocoolers and ever-larger microturbines. Emerging products in the automotive sector (turbochargers and superchargers) indicate that high volume serial production of foil bearings is imminent. Demonstration of foil bearings in APU s and select locations in propulsion gas turbines illustrates that such technology also has a place in these future systems. Foil bearing designs, predictive tools and advanced solid lubricants have been reported that can satisfy anticipated requirements but a major question remains regarding the scalability of foil bearings to ever larger sizes to support heavier rotors. In this paper, the technological history, primary physics, engineering practicalities and existing experimental and experiential database for scaling foil bearings are reviewed and the major remaining technical challenges are identified.
Document ID
20100033099
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
DellaCorte, Christopher (NASA Glenn Research Center Cleveland, OH, United States)
Bruckner, Robert J. (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 25, 2013
Publication Date
August 1, 2010
Subject Category
Chemistry And Materials (General)
Report/Patent Number
GT2010-22086
E-17383
NASA/TM-2010-216762
Meeting Information
Meeting: American Society of Mechanical Engineers (ASME)
Location: Glasgow, Scotland
Country: United Kingdom
Start Date: June 14, 2010
End Date: June 18, 2010
Funding Number(s)
WBS: WBS 877868.02.07.03.01.01.04
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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