Fluid flow and thermal features of gas foil thrust bearings at moderate operating temperatures

Abdelrasoul M. Gad; Shigehiko Kaneko

doi:10.1007/978-3-319-06590-8_100

Fluid flow and thermal features of gas foil thrust bearings at moderate operating temperatures

Abdelrasoul M. Gad^*, Shigehiko Kaneko

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Citations (Scopus)

Abstract

This study aims to analyze the flow characteristics and the thermal features of foil thrust bearing. The flow in the gas film is modeled with 2D compressible Reynolds equation including effects of centrifugal forces in the gas film. The Couette Approximation is adopted for the analysis of temperature distribution in the gas film, and the small perturbations method is used to calculate its dynamic force coefficients. The results show that the Couette Approximation can be used to calculate the temperature distribution in foil thrust bearing with reasonable accuracy and the analysis of the fluid flow reveals that most of the side-leakage occurs in the low-temperature converging region removing less than 5% of the heat generated in the gas film. Furthermore, with the proper control of cooling flow rate through the bump foils, more than 70% of the heat generated in the gas film can be removed.

Original language	English
Title of host publication	Proceedings of the 9th IFToMM International Conference on Rotor Dynamics
Editors	Paolo Pennacchi
Publisher	Kluwer Academic Publishers
Pages	1223-1233
Number of pages	11
ISBN (Electronic)	9783319065892
DOIs	https://doi.org/10.1007/978-3-319-06590-8_100
Publication status	Published - 2015
Externally published	Yes
Event	9th IFToMM International Conference on Rotor Dynamics, 2014 - Milan, Italy Duration: 2014 Sept 22 → 2014 Sept 25

Publication series

Name	Mechanisms and Machine Science
Volume	21
ISSN (Print)	2211-0984
ISSN (Electronic)	2211-0992

Conference

Conference	9th IFToMM International Conference on Rotor Dynamics, 2014
Country/Territory	Italy
City	Milan
Period	14/9/22 → 14/9/25

Keywords

Foil thrust bearing
Static and dynamic characteristics
Thermal elastohydrodynamic lubrication

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering

Access to Document

10.1007/978-3-319-06590-8_100

Cite this

Fluid flow and thermal features of gas foil thrust bearings at moderate operating temperatures. / Gad, Abdelrasoul M.; Kaneko, Shigehiko.
Proceedings of the 9th IFToMM International Conference on Rotor Dynamics. ed. / Paolo Pennacchi. Kluwer Academic Publishers, 2015. p. 1223-1233 (Mechanisms and Machine Science; Vol. 21).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Gad, AM & Kaneko, S 2015, Fluid flow and thermal features of gas foil thrust bearings at moderate operating temperatures. in P Pennacchi (ed.), Proceedings of the 9th IFToMM International Conference on Rotor Dynamics. Mechanisms and Machine Science, vol. 21, Kluwer Academic Publishers, pp. 1223-1233, 9th IFToMM International Conference on Rotor Dynamics, 2014, Milan, Italy, 14/9/22. https://doi.org/10.1007/978-3-319-06590-8_100

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abstract = "This study aims to analyze the flow characteristics and the thermal features of foil thrust bearing. The flow in the gas film is modeled with 2D compressible Reynolds equation including effects of centrifugal forces in the gas film. The Couette Approximation is adopted for the analysis of temperature distribution in the gas film, and the small perturbations method is used to calculate its dynamic force coefficients. The results show that the Couette Approximation can be used to calculate the temperature distribution in foil thrust bearing with reasonable accuracy and the analysis of the fluid flow reveals that most of the side-leakage occurs in the low-temperature converging region removing less than 5% of the heat generated in the gas film. Furthermore, with the proper control of cooling flow rate through the bump foils, more than 70% of the heat generated in the gas film can be removed.",

keywords = "Foil thrust bearing, Static and dynamic characteristics, Thermal elastohydrodynamic lubrication",

author = "Gad, {Abdelrasoul M.} and Shigehiko Kaneko",

note = "Publisher Copyright: {\textcopyright} Springer International Publishing Switzerland 2015.; 9th IFToMM International Conference on Rotor Dynamics, 2014 ; Conference date: 22-09-2014 Through 25-09-2014",

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doi = "10.1007/978-3-319-06590-8_100",

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AU - Gad, Abdelrasoul M.

AU - Kaneko, Shigehiko

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PY - 2015

Y1 - 2015

N2 - This study aims to analyze the flow characteristics and the thermal features of foil thrust bearing. The flow in the gas film is modeled with 2D compressible Reynolds equation including effects of centrifugal forces in the gas film. The Couette Approximation is adopted for the analysis of temperature distribution in the gas film, and the small perturbations method is used to calculate its dynamic force coefficients. The results show that the Couette Approximation can be used to calculate the temperature distribution in foil thrust bearing with reasonable accuracy and the analysis of the fluid flow reveals that most of the side-leakage occurs in the low-temperature converging region removing less than 5% of the heat generated in the gas film. Furthermore, with the proper control of cooling flow rate through the bump foils, more than 70% of the heat generated in the gas film can be removed.

AB - This study aims to analyze the flow characteristics and the thermal features of foil thrust bearing. The flow in the gas film is modeled with 2D compressible Reynolds equation including effects of centrifugal forces in the gas film. The Couette Approximation is adopted for the analysis of temperature distribution in the gas film, and the small perturbations method is used to calculate its dynamic force coefficients. The results show that the Couette Approximation can be used to calculate the temperature distribution in foil thrust bearing with reasonable accuracy and the analysis of the fluid flow reveals that most of the side-leakage occurs in the low-temperature converging region removing less than 5% of the heat generated in the gas film. Furthermore, with the proper control of cooling flow rate through the bump foils, more than 70% of the heat generated in the gas film can be removed.

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KW - Static and dynamic characteristics

KW - Thermal elastohydrodynamic lubrication

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Fluid flow and thermal features of gas foil thrust bearings at moderate operating temperatures

Abstract

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Keywords

ASJC Scopus subject areas

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