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Load capacity estimation of foil air journal bearings for oil-free turbomachinery applications / Christopher DellaCorte, Mark J. Valco ; prepared for the International Joint Tribology Conference sponsored by the Society of Tribologists and Lubrication Engineers, Seattle, Washington, October 1-4, 2000.
- Format:
- Book
- Conference/Event
- Government document
- Author/Creator:
- DellaCorte, Christopher
- Conference Name:
- ASME/STLE Tribology Conference (2000 : Seattle, Wash.)
- Series:
- ARL-TR (Aberdeen Proving Ground, Md.) ; 2334.
- NASA technical memorandum ; 209782.
- ARL-TR ; 2334
- NASA/TM ; 2000-209782
- Language:
- English
- Subjects (All):
- Journal bearings.
- Gas-turbines--Bearings.
- Gas-turbines.
- Loads (Mechanics)--Mathematical models.
- Loads (Mechanics).
- Plain bearings (Machinery).
- Physical Description:
- 1 online resource (14 pages) : illustrations.
- Place of Publication:
- Cleveland, Ohio : National Aeronautics and Space Administration, Glenn Research Center : U.S. Army Research Laboratory, [2000]
- Summary:
- This paper introduces a simple 'Rule of Thumb' (ROT) method to estimate the load capacity of foil air journal bearings, which are self-acting compliant-surface hydrodynamic bearings being considered for Oil-Free turbomachinery applications such as gas turbine engines. The ROT is based on first principles and data available in the literature and it relates bearing load capacity to the bearing size and speed through an empirically based load capacity coefficient, D. It is shown that load capacity is a linear function of bearing surface velocity and bearing projected area. Furthermore, it was found that the load capacity coefficient, D, is related to the design features of the bearing compliant members and operating conditions (speed and ambient temperature). Early bearing designs with basic or 'first generation' compliant support elements have relatively low load capacity More advanced bearings, in which the compliance of the support structure is tailored, have load capacities up to five times those of simpler designs. The ROT enables simplified load capacity estimation for foil air journal bearings and can guide development of new Oil-Free turbomachinery systems.
- Notes:
- Title from title screen (viewed on Apr. 12, 2011).
- "October 2000."
- Includes bibliographical references (pages 5-6).
- OCLC:
- 227938832
- Access Restriction:
- APPROVED FOR PUBLIC RELEASE.
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