Computational and experimental representation of simplified gas turbine bearing chamber geometries
Gas turbine engines depend on bearing chambers to support and lubricate moving parts, facilitating movement and heat dissipation. However, achieving a uniform oil coating on bearings remains a challenge, often leading to excessive oil consumption and in-flight oil loss. This research aims to establi...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | International Journal of Thermofluids |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S266620272500045X |
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| author | Ahmad H. Attia Budi Chandra C.A. Toomer |
| author_facet | Ahmad H. Attia Budi Chandra C.A. Toomer |
| author_sort | Ahmad H. Attia |
| collection | DOAJ |
| description | Gas turbine engines depend on bearing chambers to support and lubricate moving parts, facilitating movement and heat dissipation. However, achieving a uniform oil coating on bearings remains a challenge, often leading to excessive oil consumption and in-flight oil loss. This research aims to establish accurate experimental and CFD methods to measure the residence time distribution (RTD) in a simplified linear geometry, progressing towards investigations in a cylindrical bearing chamber rig.The first test case uses an inclined rectangular acrylic channel (140 cm length, 3 cm height, 5 cm width) with a 39° slope and flow rates ranging from 0.9 l/min to 2.7 l/min. This simplified geometry allows the study of fundamental oil film dynamics. The experimental setup is complemented by CFD modelling using the Volume of Fluid (VOF) approach with Large Eddy Simulations (LES) to model turbulence.Validation demonstrates high level of accuracy, with film thickness measurements showing an error margin of 0.22 % at lower flow rates and up to 1.7 % at higher velocities. These results confirm the experimental setup and CFD model's reliability, offering a solid foundation for studying multiphase flows in bearing chambers. Future phases will incorporate oil for further validation and refinement.The research question we are asking is: Can the proposed method accurately measure the residence time in an experimental setup? |
| format | Article |
| id | doaj-art-5f793923b0954240873c3a528596c78b |
| institution | Kabale University |
| issn | 2666-2027 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Thermofluids |
| spelling | doaj-art-5f793923b0954240873c3a528596c78b2025-01-31T05:12:27ZengElsevierInternational Journal of Thermofluids2666-20272025-03-0126101097Computational and experimental representation of simplified gas turbine bearing chamber geometriesAhmad H. Attia0Budi Chandra1C.A. Toomer2Corresponding author.; University of the West of England, United KingdomUniversity of the West of England, United KingdomUniversity of the West of England, United KingdomGas turbine engines depend on bearing chambers to support and lubricate moving parts, facilitating movement and heat dissipation. However, achieving a uniform oil coating on bearings remains a challenge, often leading to excessive oil consumption and in-flight oil loss. This research aims to establish accurate experimental and CFD methods to measure the residence time distribution (RTD) in a simplified linear geometry, progressing towards investigations in a cylindrical bearing chamber rig.The first test case uses an inclined rectangular acrylic channel (140 cm length, 3 cm height, 5 cm width) with a 39° slope and flow rates ranging from 0.9 l/min to 2.7 l/min. This simplified geometry allows the study of fundamental oil film dynamics. The experimental setup is complemented by CFD modelling using the Volume of Fluid (VOF) approach with Large Eddy Simulations (LES) to model turbulence.Validation demonstrates high level of accuracy, with film thickness measurements showing an error margin of 0.22 % at lower flow rates and up to 1.7 % at higher velocities. These results confirm the experimental setup and CFD model's reliability, offering a solid foundation for studying multiphase flows in bearing chambers. Future phases will incorporate oil for further validation and refinement.The research question we are asking is: Can the proposed method accurately measure the residence time in an experimental setup?http://www.sciencedirect.com/science/article/pii/S266620272500045XComputational Fluid Dynamics (CFD)Residence Time Distribution (RTD)Volume of fluid (VOF)Multiphase flowBearing chambersAero-engine lubrication |
| spellingShingle | Ahmad H. Attia Budi Chandra C.A. Toomer Computational and experimental representation of simplified gas turbine bearing chamber geometries International Journal of Thermofluids Computational Fluid Dynamics (CFD) Residence Time Distribution (RTD) Volume of fluid (VOF) Multiphase flow Bearing chambers Aero-engine lubrication |
| title | Computational and experimental representation of simplified gas turbine bearing chamber geometries |
| title_full | Computational and experimental representation of simplified gas turbine bearing chamber geometries |
| title_fullStr | Computational and experimental representation of simplified gas turbine bearing chamber geometries |
| title_full_unstemmed | Computational and experimental representation of simplified gas turbine bearing chamber geometries |
| title_short | Computational and experimental representation of simplified gas turbine bearing chamber geometries |
| title_sort | computational and experimental representation of simplified gas turbine bearing chamber geometries |
| topic | Computational Fluid Dynamics (CFD) Residence Time Distribution (RTD) Volume of fluid (VOF) Multiphase flow Bearing chambers Aero-engine lubrication |
| url | http://www.sciencedirect.com/science/article/pii/S266620272500045X |
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