Accession Number : AD0432339


Title :   A NUMERICAL SOLUTION TO THE THERMAL-ELASTOHYDRODYNAMIC LUBRICATION OF ROLLING AND SLIDING CYLINDERS,


Corporate Author : MECHANICAL TECHNOLOGY INC LATHAM N Y


Personal Author(s) : Cheng,H S


Report Date : 25 Feb 1964


Pagination or Media Count : 99


Abstract : Existing isothermal theories of elastohydrodynamic lubrication of rollers are extended to include the effects of temperature in the fluid and the solids due to heating from rolling, sliding and compression of the lubricant. The two dimensional finite difference method has been used in calculating the temperature in the fluid using local pressure-temperature dependent viscosity. Both the compressibility effect and the heat from compression of the lubricant are considered in the solution of the Reynolds and the energy equation. Two series of results were obtained. The first is a heavily loaded series intended to correlate with Crook's experimental results, and the second is a moderately loaded series intended to correlate with temperature measurements taken at this laboratory. These results show that temperature has a significant influence upon the shape of the pressure, film profile, but very little effect upon the magnitude of the film thickness in the contact zone. The frictional force is, however, strongly influenced by the temperature rise in the film. (Author)


Descriptors :   *HYDRODYNAMICS , LUBRICATION , FRICTION , ELASTIC PROPERTIES , FLUID DYNAMICS , REYNOLDS NUMBER , FILMS , COMPRESSIVE PROPERTIES , ENERGY , DIFFERENTIAL EQUATIONS , INTEGRAL EQUATIONS , VISCOSITY , SURFACE TEMPERATURE , TEMPERATURE , DISTRIBUTION , THICKNESS


Distribution Statement : APPROVED FOR PUBLIC RELEASE