The Prospects for Magnetohydrodynamic Lubrication 640411
Recent interest in high temperature lubrication, in particular liquid metal lubrication, has prompted an investigation of the possible use of hydromagnetic effects to increase bearing pressurization and load capacity. It has been found that by applying an external magnetic field a significant increase in pressurization can be achieved over the purely hydrodynamical bearing. Recent literature on the subject is herein reviewed and the order of magnitude of the magnetohydrodynamical effect in lubrication is discussed. Several practical arrangements for hydromagnetic bearings are briefly analyzed and evaluated.
It is pointed out that a magnetic field applied transversely to the fluid film is more effective than a tangential field. In general, frictional forces are increased over the hydrodynamical bearing, but larger film thicknesses can be maintained.