Liquid Transported Powder Lubricant Study.
Abstract
Doubling the propulsion capacity of high efficiency gas turbine engines will require significant advances in engine lubricants and lubrication systems. Powder lubricants have been identified as likely candidates for bearings required to operate at temperature levels well in excess of temperature capabilities of liquid lubricants. Powder lubricants can be delivered by either air or liquid carriers. This study deals with lubrication qualities of powder lubricant slurries where the carrier liquid is ethylene glycol. Traction coefficients, determined both experimentally and theoretically were the focus of this research. Experimental data was taken on the University of Southwestern Louisiana campus using a traction rig on loan from the USAF. Theoretical work was done primarily at the University of Pittsburgh. Initial traction measurements were conducted on a standard petroleum based lubricant to provide a baseline check on the traction rig and instrumentation. The experimental results check out favorably with known results in the literature. Theoretical prediction of traction coefficients for this Newtonian fluid also correlated well with laboratory measurements. Ethylene glycol slurry data at approximately 100 deg F showed significantly lower traction coefficient levels than predicted theoretically. This was repeatable and deserves further investigation. Different results may be expected at elevated temperatures when the ethylene glycol is driven from the slurry. jg
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1995
- Accession Number
- ADA304885
Entities
People
- Don W. Dareing
- Michael Khonsari
Organizations
- University of Louisiana at Lafayette