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Prediction of Acoustic Emissions of Turbocharger Bearings
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 30, 2020 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Event: 11th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference
Turbochargers are progressively used in modern automotive engines to enhance engine performance and reduce energy loss and adverse emissions. Use of turbochargers along with other modern technologies has enabled development of significantly downsized internal combustion engines. However, turbochargers are major sources of acoustic emissions in modern automobiles. Their acoustics has a distinctive signature, originating from fluid-structure interactions. The bearing systems of turbochargers also constitute an important noise source. In this case, the acoustic emissions can mainly be attributed to hydrodynamic pressure fluctuations of the lubricant film. The developed analytical model determines the lubricant pressure distribution in the floating journal bearings used mainly in the modern turbocharges. This allows for an estimation of acoustic emissions. The use of such an analytical approach is computationally efficient when compared with full numerical analysis approaches, whilst also providing reliable predictions. The results from the developed analytical model are used to determine the power loss as well as sound pressure levels generated in the turbocharger bearings due to oil flow which can be correlated with the acoustic emissions of turbochargers.
CitationDolatabadi, N., Rahmani, R., and Rahnejat, H., "Prediction of Acoustic Emissions of Turbocharger Bearings," SAE Technical Paper 2020-01-1504, 2020, https://doi.org/10.4271/2020-01-1504.
Data Sets - Support Documents
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- Bernhauser, L., Steinwender, L., and Neumayer, R. , “Efficient Run-Up Simulations for the Investigation of Acoustically Relevant Vibrations of Turbocharger Structures with Floating-Ring Bearings,” in Proceedings of the DAGA, Aachen, Germany, 2016.
- Kirk, R.G., and Alsaeed, A.A. , “Stability Analysis of a High-Speed Automotive Turbocharger,” Tribology Transactions 50(3):427-434, 2007.
- Tian, L., Wang, W.J., and Peng, Z.J. , “Dynamic Behaviours of a Full Floating Ring Bearing Supported Turbocharger Rotor with Engine Excitation,” Journal of Sound and Vibration 330:4851-4874, 2011.
- Schweizer, B., and Sievert, M. , “Nonlinear Oscillations of Automotive Turbocharger Turbines,” Journal of Sound and Vibration 321(3-5):955-975, 2009.
- San Andres, L., Rivadeneira, J.C., Chinta, M., Gjika, K. et al. , “Nonlinear Rotordynamics of Automotive Turbochargers: Predictions and Comparisons to Test Data,” Journal of Engineering for Gas Turbines and Power 129(2):488-493, 2007.
- Brouwer, M.D., Sadeghi, F., Lancaster, C., Archer, J. et al. , “Whirl and Friction Characteristics of High Speed Floating Ring and Ball Bearing Turbochargers,” Journal of Tribology 135(4):041102, 2013.
- Smolik, L., Hajzman, M., and Byrtus, M. , “Investigation of Bearing Clearance Effects in Dynamics of Turbochargers,” International Journal of Mechanical Sciences 127:62-72, 2017.
- Koutsovasilis, P., Driot, N., Lu, D., and Schweizer, B. , “Quantification of Sub-Synchronous Vibrations for Turbocharger Rotors with Full-Floating Ring Bearings,” Archive of Applied Mechanics 85:481-502, 2015.
- Gohar, R., and Rahnejat , Fundamentals of Tribology (London: Imperial College Press, 2008).
- Mokhrtar, M.O.A. , “Floating Ring Journal Bearings: Theory, Design and Optimization,” Tribology International. 14(2):113-119, 1981.
- Rho, B.H., and Kim, K.W. , “Acoustical Properties of Hydrodynamic Journal Bearings,” Tribology International 36:61-66, 2003.
- Mohammadpour, M., Rahmani, R., and Rahnejat, H. , “Effect of Cylinder Deactivation on the Tribo-Dynamics and Acoustic Emission of Overlay Big End Bearings,” Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 228(2):138-151, 2014.
- Cameron, A. , The Principles of Lubrication (John Wiley, 1966).