Accession Number:

ADA237671

Title:

A System-Approach to the Elastohydrodynamic Lubrication Point-Contact Problem

Descriptive Note:

Technical memorandum,

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER

Personal Author(s):

Report Date:

1991-05-02

Pagination or Media Count:

17.0

Abstract:

The classical EHL point contact problem is solved using a new system approach, similar to that introduced by Houpert and Hamrock for the line- contact problem. Introducing a body-fitted coordinate system, the troublesome free boundary is transformed to a fixed domain. The Newton-Raphson method can then be used to determine the pressure distribution and the cavitation boundary subject to the Reynolds boundary condition. This method provides an efficient and rigorous way of solving the EHL point contact problem with the aid of a supercomputer and a promising method to deal with the transient EHL point contact problem. A typical pressure distribution and film thickness profile are presented and the minimum film thicknesses are compared with the solution of Hamrock and Dowson. The details of the cavitation boundaries for various operating parameters are discussed.

Subject Categories:

  • Lubricants and Hydraulic Fluids
  • Numerical Mathematics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE