Abstract
Aerodynamic foil bearings have successfully applied to micro-gas turbines for distributed electric power supply. Aerodynamic foil bearings have such advantages that they can operate at high temperature and high speeds. In this paper, the stability of aerodynamic gas foil journal bearings at high speeds is experimentally investigated using a spirally-wound foil bearing with half-spherical bumps and the usefulness of this type of foil bearing is clarified.
