EFFECT OF SLIP FLOW ON THE STEADY-STATE PERFORMANCE OF AEROSTATIC POROUS JOURNAL BEARINGS.

A theoretical solution is presented considering three dimensional flow in the porous media. The analysis takes into account the velocity slip at the film bearing interface by using Beavers-Joseph criterion. Results are presented in dimensionless form for load capacity and mass rate of flow for different operating conditions and bearing dimensions. Solution is also obtained for modified slip velocity conditions and both the results are compared. There is little agreement between the two models. Hence, it is preferable to use the Beavers-Joseph model in order to account for all values of slip parameters. The effect of slip velocity on the static characteristics is discussed.