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Noise Prediction of an Alternator Fan: Numerical Results and Experimental Validation
Technical Paper
2015-26-0137
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Fan is generally used for cooling of alternator and an undesirable side effect of these fans is generation of flow induced noise. With stricter regulations and growing importance on acoustic comfort in present day market, it's very important to address flow induced noise problems early in product development stage. With physical testing, it would not be possible to get information on source strengths thus, limiting its usage. Whereas simulation on the other hand would be able to provide source strengths, directivity pattern and source ranking. This paper focuses on numerical simulation of alternator's fan for prediction of air- borne noise. For this purpose, Computational Fluid Dynamics (CFD) based transient analysis is performed with high fidelity turbulence model using commercial software package, ANSYS Fluent. Ffowcs Williams and Hawkings (FW-H) model is used for modeling sound propagation. Overall sound pressure level for fan (source) is calculated at various receiver locations. Thus air induced fan noise, interaction of moving blades with surrounding air and the impact of the moving air on nearby static components is studied.
Authors
Citation
Agrawal, H., Kakade, A., Singh, A., and Shetty, S., "Noise Prediction of an Alternator Fan: Numerical Results and Experimental Validation," SAE Technical Paper 2015-26-0137, 2015, https://doi.org/10.4271/2015-26-0137.Also In
References
- Lighthill M. J. On sound generated aerodynamically: I. General theory Proc. R. Soc. Series A 211 564 587 1952
- CURLE N. The influence of solid boundaries on aerodynamic sound Proceedings of the Royal Society of London A231 505 514 1955
- Williams J. E. Ffowcs , Hawkings D. L. Sound generation by turbulence and surfaces in arbitrary motion Phil. Trans. R. Soc. Series A 264 1151 321 342 1969
- Lockard David P. An Efficient, Two-dimensional Implementation Of The Ffowcs Williams And Hawkings Equation Journal of Sound and Vibration 229 4 897 911 2000
- Farassat F. Acoustic Radiation From Rotating Blades-the Kirchhoff Method In Aeroacoustics Journal of Sound and Vibration 2001 239 4 785 800 2000
- Ansys Fluent 15.0 user guide
- Spalart P. R. , Deck S. , Shur M. L. , Squires K. D. , Strelets M. Kh. , and Travin A. A New Version of Detached-eddy Simulation, Resistant to Ambiguous Grid Densities Theoretical and Computational Fluid Dynamics Springer Berlin / Heidelberg 20 181 195 2006