Fiche de cours

Thin Film Lubrication and Gas-Lubricated Bearings

ENG-649

Fiche de cours

Enseignant(s) :

Invited lecturers (see below)
Schiffmann Jürg Alexander

Langue:

English

Frequency

Every year

Remark

Next time: tbd

Summary

This course introduces thin film lubrication and its applications to gas-lubricated bearings, including rotordynamics to enable the assessment of the operation of gas-bearing supported rotors.

Content

• Derivation of Reynolds equations
• Hydrodynamic slider bearing
• Infinite-length journal bearing
• Finite length slider
• Finite length aerodynamic bearing
• Dynamic grooved bearings
• Real gas effects
• Condensation
• Practical implementation of gas-lubricated bearings
• Rotordynamics

Note

Deadline to register: May 16th, 2025 at 7pm at the latest

Keywords

Thin film lubrication, gas-lubricated bearings, rotordynamics

Learning Prerequisites

Required courses

Fluid mechanics, dynamical systems

Learning Outcomes

By the end of the course, the student must be able to:

• Select appropriately models to design gas-bearing supported rotors as a function of the operating conditions and applications.

Assessment methods

Students will have to prepare a short report about the numerical implementation of two
problems chosen among the proposed ones. A presence of at least 75% of the lessons is
requested together with the report to receive the credits.

Resources

Moodle Link

• https://go.epfl.ch/ENG-649