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Numerical Investigation of Narrow-Band Noise Generation by Automotive Cooling Fans
Technical Paper
2020-01-1513
ISSN: 0148-7191, e-ISSN: 2688-3627
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Abstract
Axial cooling fans are commonly used in electric vehicles to cool batteries with high heating load. One drawback of the cooling fans is the high aeroacoustic noise level resulting from the fan blades and the obstacles facing the airflow. To create a comfortable cabin environment in the vehicle, and to reduce exterior noise emission, a low-noise installation design of the axial fan is required. The purpose of the study is to investigate efficient computational aeroacoustics (CAA) simulation processes to assist the cooling-fan installation design. In this paper we report the current progress of the investigation, where the narrow-band components of the fan noise is focused on. Two methods are used to compute the noise source. In the first method the source is computed from the flow field obtained using the unsteady Reynolds-averaged Navier-Stokes equations (unsteady RANS, or URANS) model. In the second method, the azimuthal modes of the flow field obtained using the steady RANS with the moving reference frame (MRF) model are treated as the “sound source”. The acoustic field generated by the sound source is calculated by solving the inhomogeneous Helmholtz equation. The simulation process based on both methods is applied to a benchmark case from the literature and the simulated results are compared with experimental data.
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Fares, O., Weng, C., Zackrisson, L., Yao, H. et al., "Numerical Investigation of Narrow-Band Noise Generation by Automotive Cooling Fans," SAE Technical Paper 2020-01-1513, 2020, https://doi.org/10.4271/2020-01-1513.Data Sets - Support Documents
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References
- Zenger , F. , Junger , C. , Kaltenbacher , M. , and Becker , S. A Benchmark Case for Aerodynamics and Aeroacoustics of a Low Pressure Axial Fan SAE Technical Paper 2016-01-1805 2016 https://doi.org/10.4271/2016-01-1805
- Brandl , S. , Biermayer , W. , Graf , B. , and Resch , T. Hybrid Vehicle’s NVH Challenges and Influences on the NVH Development SAE Technical Paper 2016-01-1837 2016 https://doi.org/10.4271/2016-01-1837
- Khelladi , S. , Kouidri , S. , Bakir , F. , and Rey , R. Predicting Tonal Noise from a High Rotational Speed Centrifugal Fan Journal of Sound and Vibration 313 1 113 133 2008
- Rynell , A. , Chevalier , M. , Åbom , M. , and Efraimsson , G. A Numerical Study of Noise Characteristics Originating from a Shrouded Subsonic Automotive Fan Applied Acoustics 140 110 121 2018
- Kaltenbacher , M. , Hüppe , A. , Reppenhagen , A. , Krömer , F. et al. Computational Aeroacoustics for Rotating Systems with Application to an Axial Fan AIAA Journal 55 09 2017
- Junger , C. , Krömer , F. , Reppenhagen , A. , Kaltenbacher , M. et al. Numerical Simulation of a Benchmark Case for Aerodynamics and Aeroacoustics of a Low Pressure Axial Fan 08 2016
- Gullberg , P. , and Sengupta , R. Axial Fan Performance Predictions in CFD, Comparison of mrf and Sliding Mesh with Experiments SAE Technical Paper 2011-01-0652 2011 https://doi.org/10.4271/2011-01-0652
- Gullberg , P. , Lofdahl , L. , and Nilsson , P. Cooling Airflow System Modeling in CFD Using Assumption of Stationary Flow Commercial Vehicle Engineering Congress 2011
- 2016
- 2017
- Oberai , A.A. , Roknaldin , F. , and Hughes , T.J.R. Computational Procedures for Determining Structural-Acoustic Response due to Hydrodynamic Sources Computer Methods in Applied Mechanics and Engineering 190 345 361 2000
- Glegg , S. and Devenport , W. 18-Fan Noise Glegg , S. and Devenport , W. Aeroacoustics of Low Mach Number Flows Academic Press 2017 463 500
- Morfey , C. Rotating Blades and Aerodynamic Sound Journal of Sound and Vibration 28 3 587 617 1973
- Curle , N. The Influence of Solid Boundaries upon Aerodynamic Sound Proceedings of the Royal Society of London A: Mathematical, Physical and Engineering Sciences 231 1187 505 514 1955
- Howe , S. Theory of Vortex Sound Cambridge Texts in Applied Mathematics Cambridge University Press 2003
- Brentner , K.S. , and Farassat , F. Analytical Comparison of the Acoustic Analogy and Kirchhoff Formulation for Moving Surfaces AIAA Journal 36 8 1379 1386 1998
- Fares , O. 2019
- Blake , W.K. Chapter 6—Noise from Rotating Machinery Blake , W.K. Mechanics of Flow-Induced Sound and Vibration 2 Second Edition Academic Press 2017 505 658
- MATLAB 2016
- 2019
- Magne , S. , Moreau , S. , and Berry , A. Subharmonic Tonal Noise from Backflow Vortices Radiated by a Low-Speed Ring Fan in Uniform Inlet Flow The Journal of the Acoustical Society of America 137 1 228 237 2015