What question did this study set out to answer?

This study aims to measure friction losses and temperature changes in an active gas foil bearing with varying sleeve diameters during start-up and coast-down.

May 25, 2026Open Access

Start-up and coast-down friction and temperature in an active gas foil journal bearing with adjustable sleeve diameter

Key Points

This study aims to measure friction losses and temperature changes in an active gas foil bearing with varying sleeve diameters during start-up and coast-down.
Experimental measurements taken for an active gas foil bearing with adjustable sleeve diameter.
Friction losses assessed during both start-up and coast-down across 15 different sleeve diameters.
Temperature effects linked to varying clearances were analyzed.
Coast-down conditions produced higher friction-induced energy compared to start-up.
Optimal clearance settings significantly reduced both the friction torque magnitude and peak temperature.

Abstract

• Active gas foil bearing with adjustable sleeve diameter is experimentally measured. • Transient friction losses quantified during start-up and coast-down for 15 diameters. • Coast-down produces higher friction-induced energy than start-up. • Optimal clearance reduces both friction torque magnitude and peak temperature.

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Cite This Study

Breńkacz et al. (Fri,) studied this question.

synapsesocial.com/papers/6a13e8520e02ee3982d331a6 https://doi.org/https://doi.org/10.1016/j.measurement.2026.122020

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