Comparison of predicted and measured elastohydrodynamic film thickness in a 20-millimeter-bore ball bearing
John J. Coy, Rama S. R. Gorla, Dennis P. Townsend, Propulsion Laboratory (U.S.), Lewis Research Center, United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1979 - Technology & Engineering - 26 pages
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20-MILLIMETER-BORE BALL BEARING aircraft engine oil antiwear additive AVRADCOM Research Battelle Memorial Institute bearing was mist bearing was thrust capacitance bridge capacitance technique Cleveland Cleveland State University compared to theoretical computer program results Contact lubrication flow Dimensionless speed parameter Dowson ref EHD film Elastohydrodynamic Film Thickness electrical capacitance engine oil meeting experimental data experiments film thickness measurement film thickness reduction Four different lubricants Grubin H film higher speeds hydrocarbon traction fluid inlet shear heating inner race kinematic starvation Lewis Research Center loaded to 90 lubricant film thickness lubrication flow number materials parameter maximum contact stress measured film thickness Mech mist lubricated NASA newtons 20 optical paraffinic with additives Polyphenyl ether present data pressure-viscosity exponent Rama S. R. Gorla ranged from 400 Semimajor axis shown in figure Surface tension synthetic type test bearing test rig theoretical predictions Thermal thermocouple thicknesses were measured thrust loaded viscosity