Influence of secondary factors on characteristics of externally pressurized porous annular thrust gas bearings

In this study, we investigated the influence of secondary factors, i.e., th e slip velocity, gas leakage from the edges of porous surface, thickness of restricted layer and the effective area of porous surface on the character istics of an externally pressurized porous annular thrust gas bearing which has a thin restricted surface layer. By comparing numerically calculated r esults with experimental ones, it was found that the numerically calculated results which take account of secondary factors agree well with the experi mental results in a clearance region greater than 2 mu m.