The present study is an attempt to find the whirl instability of externally pressurized two-layered porous oil journal bearings using a non-linear transient method. This analysis gives the journal centre locus, from which the system stability can be ascertained. Several trajectories of the journal centre have been drawn for different operating conditions. It has been observed that a two-layered porous journal bearing gives higher stability than the conventional (single-layered) porous journal bearing.
HeinzlJ.Aerostatisches Lager. Germ. Pat. De 31 10712 A1, Munich, 1982.
2.
OkanoM.Studies of externally pressurized porous gas bearingsRes. Electrotech. Lab., April 1991, 952, 1–145.
3.
CusanoC.Lubrication of a two-layer porous oil journal bearingJ. Mech. Engng Sci., 1972, 14 (5), 335–339.
4.
CusanoC.Analytical investigation of an infinitely long, two-layer, porous bearingWear, 1972, 22, 59–67.
5.
KirkR.GunterE. J.Transient journal bearing analysis. Report NASA CR-1549, National Aeronautics and Space Administration, June 1970.
6.
AkersA.MichaelsonS.CameronA.Stability contours for a whirling finite journal bearingTrans. ASME, J. Lubric. Techol., Series F, 93 (1), 1971, 177–190.
7.
ChattopadhyayA. K.MajumdarB. C.RaoN. S.Stability of a rigid rotor in finite hydrostatic journal bearings with slipTrans. ASME, J. Tribology, 1987, 109, 301–306.
8.
MajumdarM. C.MajumdarB. C.Non-linear transient analysis for an externally pressurized porous gas journal bearingWear, 1989, 132, 139–150.
9.
ChattopadhyayA. K.MajumdarB. C.Steady state solution of finite hydrostatic porous bearing considering tangential velocity slipTribology Int., 1984, 17 (6), 317–323.
10.
SahaN.MajumdarB. C.Study of externally pressurized gas-lubricated two-layered porous journal bearings: A steady state analysisProc. Instn Mech. Engrs, Part J, J. Engineering Tribology, 2002, 216 (J3), 151–158.
