Accession Number : AD0671830

Title :   MEAN FREE PATH EFFECT IN SPIRAL GROOVED THRUST BEARINGS.

Descriptive Note : Technical rept.,

Corporate Author : MECHANICAL TECHNOLOGY INC LATHAM N Y

Personal Author(s) : Hsing,F. C. ; Malanoski,S. B.

Report Date : NOV 1967

Pagination or Media Count : 56

Abstract : The objective of the paper is to study the effect of the mean-free path on the steady-state performance characteristics of a spiral-grooved thrust bearing operating in extremely thin film and/or low ambient pressure environments. Numerical results for the most popular three versions of the spiral-grooved designs are presented. These results reveal that the effect of slip boundary conditions could contribute substantial reduction in performance. Helium is the worst gas lubricant in this sense because of its high Knudsen number. The slip-flow corrected results check well with recently published experimental data. (Author)

Descriptors :   (*THRUST BEARINGS, PERFORMANCE(ENGINEERING)), DESIGN, HELIUM, GAS BEARINGS, LUBRICANTS, KNUDSEN NUMBER, PRESSURE, KINETIC THEORY

Subject Categories : Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE