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Pressure-viscosity measurements for several lubricants to 5.5 x 10 to the 8th power Newtons per square meter (8 x 10 to the 4th psi) and 149 C (300 F)A capillary viscometer was used to measure viscosity as a function of pressure, temperature, and shear stress for a number of lubricants. The conditions under which the measurements were made are specified. The results obtained for each material are analyzed. It was determined that all pressure-viscosity coefficients decreased with increasing temperature. Data from other techniques such as optical elastohydrodynamics, oscillating crystal, and low shear capillary viscometry were compared with the results obtained.
Document ID
19740023831
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Technical Note (TN)
Authors
Jones, W. R. (NASA Lewis Research Center Cleveland, OH, United States)
Johnson, R. L. (NASA Lewis Research Center Cleveland, OH, United States)
Winer, W. O. (Georgia Inst. of Tech. Atlanta, United States)
Sanborn, D. M. (Georgia Inst. of Tech. Atlanta, United States)
Date Acquired
September 3, 2013
Publication Date
August 1, 1974
Subject Category
Machine Elements And Processes
Report/Patent Number
E-7952
NASA-TN-D-7736
Report Number: E-7952
Report Number: NASA-TN-D-7736
Accession Number
74N31944
Funding Number(s)
PROJECT: RTOP 501-24
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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