EXPERIMENTAL STRUCTURAL STIFFNESS AND DAMPING IN A 2(ND) GENERATION FOIL BEARING FOR INCREASING SHAFT TEMPERATURES Conference Paper uri icon

abstract

  • Demonstrated gas foil bearing (GFB) operation at high temperature is of interest for gas turbine applications. The effects of (high) shaft temperature on the structural stiffness and damping parameters of a foil bearing must be assessed experimentally. Presently, a hollow shaft warmed by an electric heater holds a floating 2nd generation FB that is loaded dynamically by an electromagnetic shaker. In tests with the shaft temperature up to 184C, the measurements of dynamic load and ensuing FB deflection render the bearing structural parameters, stiffness and damping, as a function of excitation frequency and amplitude of motion. The identified FB stiffness and viscous damping coefficients increase with shaft temperature due to a reduction in the FB clearance. The bearing material structural loss factor, best representing mechanical energy dissipation, decreases slightly with shaft temperature while increasing with excitation frequency.

name of conference

  • ASME/STLE 2009 International Joint Tribology Conference

published proceedings

  • PROCEEDINGS OF THE ASME/STLE INTERNATIONAL JOINT TRIBOLOGY CONFERENCE - 2009

author list (cited authors)

  • Andres, L. S., & Ryu, K.

citation count

  • 0

complete list of authors

  • Andres, Luis San||Ryu, Keun

publication date

  • January 2010