Gas foil bearing effect of foil materials and stability analysis using different models for foil structure

Abstract

Gas foil bearings GFBs are compliant surfaces self acting hydrodynamic bearings typically constructed from several layers of sheet metal foils These foils rest on elastic support structure and their performance largely depends on this support structure A commonly used such foil structure consists of bump strips and the smooth foil rest on top of these strips The widespread usage of GFBs includes turbomachinery applications such as in turbo generators turbines IC engines compressors pum