Performance characteristics of gas-lubricated bump-type foil thrust bearing

Abdelrasoul M. Gad*, Shigehiko Kaneko

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


In the present study, the static and dynamic characteristics of Generation II bump-type foil thrust bearings are investigated. For the static characteristics, a 2D compressible Reynolds equation containing effects of centrifugal forces is derived to model the fluid flow in the thin gas film. The compliance of the bearing is calculated using analytical structural stiffness model. The fluid flow equation is coupled to the structural stiffness model and the coupled fluid-structure interaction problem is solved iteratively to obtain the steady-state characteristics of the bearing. For the dynamic characteristics, small perturbations method is used to obtain the linearized equations for the pressure components of dynamic force coefficients. The effects of rotation speed, ramp height, nominal film thickness, friction coefficients at bump foil interfaces, and bump foil stiffness on the static and dynamic characteristics of Generation II foil thrust bearings are thoroughly analyzed.

Original languageEnglish
Pages (from-to)746-762
Number of pages17
JournalProceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
Issue number6
Publication statusPublished - 2015 Jun 3
Externally publishedYes


  • Foil thrust bearing
  • centrifugal force effect
  • elastohydrodynamic lubrication
  • generation II
  • static and dynamic characteristics

ASJC Scopus subject areas

  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films


Dive into the research topics of 'Performance characteristics of gas-lubricated bump-type foil thrust bearing'. Together they form a unique fingerprint.

Cite this