Accession Number : AD0908721

Title :   Calculation of Pressure, Shear and Flow in Lubricating Films for High Speed Bearing,

Corporate Author : MECHANICAL TECHNOLOGY INC LATHAM NY

Personal Author(s) : Pan, C. H. T.

Report Date : MAR 1973

Pagination or Media Count : 57

Abstract : Although superlaminar momentum transport tends to supress the relative importance of inertia effects for moderately high-speed lubrication flows, the ultimate prevalence of inertia effects at very high speeds is at least a theoretical possibility. Thus, in high-speed lubrication technology, the importance of inertia effects is preceded by that of superlaminar phenomena. The relation between them is not merely hierarchical. Because inertia effects alter the shear stress distribution in the lubricant film, and because superlaminar momentum transport is influenced by the shear stress distribution, there is an interaction between inertia effects and superlaminar momentum transport when both are present. Since this question arises primarily at very high speeds, the superlaminar process would be essentially turbulence. To examine the significance of inertia effects in high-speed lubrication, a perturbation analysis upon the linearized turbulent lubrication theory is outlined.

Descriptors :   *FILMS), (*LUBRICANTS, (*BEARINGS, LUBRICANTS), MATHEMATICAL MODELS, PRESSURE, SHEAR STRESSES, FLUID FLOW, FLUID MECHANICS, INERTIA, LAMINAR FLOW, MOMENTUM, TRANSPORT PROPERTIES, PERTURBATION THEORY, CONVECTION(HEAT TRANSFER), REYNOLDS NUMBER, KINETIC ENERGY, INTEGRALS, TURBULENT BOUNDARY LAYER.

Subject Categories : Lubricants and Hydraulic Fluids
      Machinery and Tools
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE