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Prediction of Film Thickness of an Aero-Engine Bearing Chamber using Coupled VOF and Thin Film Model

Singh, Kuldeep; Sharabi, Medhat; Ambrose, Stephen; Eastwick, Carol; Jefferson-Loveday, Richard J

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Authors

Dr KULDEEP SINGH KULDEEP.SINGH@NOTTINGHAM.AC.UK
Senior Application Engineers Inindustrialisation of Electrical Machines

Medhat Sharabi

CAROL EASTWICK CAROL.EASTWICK@NOTTINGHAM.AC.UK
Professor of Mechanical Engineering

Richard J Jefferson-Loveday



Abstract

In the present work, a coupled volume-of-fluid (VOF) model with Eulerian thin-film model (ETFM) approach is used to predict the film thickness in an aero-engine bearing chamber. Numerical studies are conducted for a wide range of shaft speeds with lubricant and air flow rates of 100 l/hr and 10 g/s respectively, at a scavenge ratio of 4 on a simplified bearing chamber test rig. Air-flow analysis inside the bearing chamber is also assessed. Primary and secondary airflow predictions are found to be in good agreement with the experimental results. The coupled ETFM+VOF approach is found to be sensitive enough to capture the qualitative trend of oil film formation and distribution over the chamber wall. Oil collection near the sump at a low shaft speed and a rotating oil film at a higher shaft speed are well captured.

Citation

Singh, K., Sharabi, M., Ambrose, S., Eastwick, C., & Jefferson-Loveday, R. J. (2019). Prediction of Film Thickness of an Aero-Engine Bearing Chamber using Coupled VOF and Thin Film Model. In Proceedings of ASME Turbo Expo 2019 Turbomachinery Technical Conference & Exposition

Conference Name ASME Turbo Expo 2019 Turbomachinery Technical Conference & Exposition
Conference Location Phoenix, Arizona, United States
Start Date Jun 17, 2019
End Date Jun 21, 2019
Acceptance Date Jan 30, 2019
Online Publication Date Jun 26, 2019
Publication Date Jun 26, 2019
Deposit Date Oct 17, 2019
Publicly Available Date Mar 29, 2024
Book Title Proceedings of ASME Turbo Expo 2019 Turbomachinery Technical Conference & Exposition
Public URL https://nottingham-repository.worktribe.com/output/1530795
Related Public URLs https://event.asme.org/Turbo-Expo-2019
Additional Information GT2019-91314

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Prediction of Film Thickness of an Aero-Engine Bearing Chamber using Coupled VOF and Thin Film Model (2.5 Mb)
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Copyright Statement
©Rolls Royce plc




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