Accession Number : ADA304885

Title :   Liquid Transported Powder Lubricant Study.

Descriptive Note : Final rept. Mar 92-Mar 95,

Corporate Author : UNIVERSITY OF SOUTHWESTERN LOUISIANA LAFAYETTE

Personal Author(s) : Dareing, Don W. ; Khonsari, Michael

PDF Url : ADA304885

Report Date : JUN 1995

Pagination or Media Count : 218

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

Descriptors :   *LIQUIDS, *POWDERS, *GAS TURBINES, *ENGINES, *LUBRICANTS, *ETHYLENE GLYCOL, MEASUREMENT, TEMPERATURE, EXPERIMENTAL DATA, CAPACITY(QUANTITY), HIGH TEMPERATURE, PROPULSION SYSTEMS, SLURRIES, MATHEMATICAL PREDICTION, COEFFICIENTS, TRACTION, LOW LEVEL, LABORATORY PROCEDURES, FLUIDS, BEARINGS, LUBRICATION, PETROLEUM PRODUCTS, CHECKOUT PROCEDURES.

Subject Categories : Lubricants and Hydraulic Fluids
      Organic Chemistry
      Machinery and Tools
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE