This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Numerical Investigation of Location and Coherence of Broadband Noise Sources for a Low Speed Axial HVAC Fan
Technical Paper
2014-01-2054
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
In hybrid and electrical vehicles new challenges in meeting the drivers' expectation with regards to acoustic comfort arise. The absence of the internal combustion engine noise enhances the passengers' perception of other noise sources, such as the Heating, Ventilation and Air-Conditioning (HVAC) system. Therefore efficient and reliable numerical models able to predict flow-induced broadband noise have become a major research topic in automotive industry.
In this framework, the Zonal LES coupled with the Ffowcs Williams-Hawkings (FWH) acoustic analogy are capable to simulate broadband noise from low speed axial fan. As demonstrated in previous works from the authors, this approach is able to cope with the complexity of the physical phenomena involved (i.e. turbulent noise generation, laminar-to-turbulent transition, etc.), even though the numerical model requires a careful setup of the mesh topology, boundary conditions and simulation parameters. The aim of this article is to provide the scientific community with the latest developments of our research work on numerical modelling of broadband noise from axial fans, focusing on the performance of two different mesh topologies to locate and estimate the noise sources. The relation between the hydrodynamic pressure fluctuations on the blade and the acoustic pressure has been investigated, focusing on noise sources coherence for different ingested turbulence intensities.
The results of the numerical simulations are compared with the experimental data acquired by the authors.
Recommended Content
| Technical Paper | Improvement of Sound Absorption Material for Diesel Engine Cover |
| Technical Paper | Development of Low Noise Working Machine based on CFD Technique |
| Technical Paper | Ducted Fan Efficiency and Noise |
Authors
Citation
Zanon, A., De Gennaro, M., Kuehnelt, H., Caridi, D. et al., "Numerical Investigation of Location and Coherence of Broadband Noise Sources for a Low Speed Axial HVAC Fan," SAE Technical Paper 2014-01-2054, 2014, https://doi.org/10.4271/2014-01-2054.Also In
References
- Ewert , R. , Schroeder , W. On the simulation of trailing edge noise with hybrid LES/APE method Journal of Sound and Vibration 270 3 2004 509 524
- Herr , M. Design Criteria for Low-Noise Trailing-Edges 13th AIAA/CEAS Aeroacoustics Conference AIAA 2007
- Bertanoglio , F. Trailing Edge Noise Model Applied to Wind Turbine Airfoils Risø-R-1633(EN) 2008
- Carolus , T. , Schneider , M. , Reese , H. Axial flow fan broad-band noise and prediction Journal of Sound and Vibration 300 2007 50 70
- Carolus , T. , Stremel , M. Blade surface pressure fluctuations and acoustic radiation from an axial fan rotor due to turbulent inflow Acta Acustica united with Acustica 88 2002 472 482
- Moreau , S. , Henner , M. , Casalino , D. , Gullbrand , J. , Iaccarino , G. , Wang , M. Toward the prediction of low-speed fan noise Proceedings of the Summer Program, Center for Turbulence Research Stanford Univ./NASA Ames 2006
- Rozenberg , Y. , Roger , M. , Moreau , S. Fan blade trailing-edge noise prediction using RANS simulations Journal of the Acoustical Society 2008 5207 5212
- De Gennaro , M. , Kuehnelt , H. Broadband Noise Modelling and Prediction for Axial Fans Proceedings of the Internataional Conference Fan Noise, Technology and Numerical Methods 2012
- De Gennaro , M. , Caridi , D. , Pourkashanian , M. Ffowcs Williams-Hawkings Acoustic Analogy for Simulation of NASA SR2 Propeller Noise in Transonic Condition Proceedings of ECCOMAS CFD 2010 Conference 2010
- De Gennaro , M. , Caridi D. , De Nicola , C. Noise Prediction of NASA SR2 Propeller in Transonic Condition AIP Conference Series Journal 1281 2010 167 170
- Polifke , W. , Poncet , A. , Paschereit , C.O. , Doebbling , D. Reconstruction of Acoustic Transfer Matrices by Instationary Computational Fluid Dynamics Journal of Sound and Vibration 245 3 2001 483 510
- Martinez-Lera , P. , Schram , C. Acoustic Source Identification in a T-Joint at Low Mach Numbers 16th International Congress on Sound and Vibration 2009
- De Gennaro , M. , Kuehnelt , H. Wiener-Hopf Technicque for Acoustic Characterization of Duct Elements Proceedings of the Forum Acusticum Conference 2011
- Kuehnelt , H. , Täuml , T. , Haumer , A. SoundDuctFlow: A Modelica Library for Modeling Acoustics and Flow in Duct Networks Proceedings of the 7th Modelica Conference 2009
- Ewert , R. Broadband slat noise prediction on CAA and stochastic sound sources from a fast random particle-mesh (RPM) method Computer and Fluids Journal 37 2008 369 387
- Ewert , R. , Emunds , R. CAA Slat Noise Studies Applying Stochastic Sound Sources Based on Solenoidal Digital Filters Proceedins of the 11th AIAA/CEAS Aeroacoustic Conference 2005
- Ewert , R. Slat Noise Trend Predictions using CAA with Stochastic Sound Sources from Random particle Mesh Method Proceedins of the 12th AIAA/CEAS Aeroacoustic Conference 2006
- Zanon , A. , De Gennaro , M. , Kuehnelt , H. , Giannattasio , P. Experimental study on the aeroacoustic performance of an axial fan for HVAC Proceedings of ISMA 2012
- Zanon , A. , De Gennaro , M. , Kuehnelt , H. , Caridi , D. Zonal ELES for axial fan broadband noise prediction: Part 1 - Experimental Study Proceedings of AIA-DAGA 2013 Conference on Acoustics 2013
- De Gennaro , M. , Zanon , A. , Kuehnelt , H. , Caridi , D. Zonal ELES for axial fan broadband noise prediction: Part 2 - Computational Test-Case Proceedings of AIA-DAGA 2013 Conference on Acoustics 2013
- De Gennaro , M. , Zanon , A. , Kuehnelt , H. , Giannattasio , P. Zonal Large Eddy Simulation for Numerical Prediction of the Acoustic Performance of an Axial Fan Proceedings of the 6th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012) September 10 14 2012
- Zanon , A. , De Gennaro , M. , Kuehnelt , H. , Caridi , D. Broadband noise of axial fans: an Experimental and Computational Benchmark Study 19th AIAA/CEAS Aeroacoustic Conference May 27 29 2013
- Zanon , A. , De Gennaro , M. , Kuehnelt , H. , Langmayr , D. , Caridi , D. CFD/CAA Modeling strategies for broadband noise prediction of low speed axial fans Proceedings of ASME Turbo Expo 2014: Turbine Technical Conference and Exposition June 16 20 2014
- 13.0, ANSYS-Fluent: Theory Guide ANSYS Inc. 2011
- Nocoud , F. , Ducros , F. Subgrid-scale stress modelling based on the square of the velocity gradient tensor flow Turbulence and Combustion 3 62 1999 183 190
- Brentner , K.S. , Farassat , F. An Analytical Comparison of the Acoustic Analogy and Kirchhoff Formulations for Moving Surfaces AIAA Journal 36 8 1998
- Lighthill , M.J. On sound generated aerodynamically: I. General theory Proc. Royal Society London 211 1952
- Lighthill , M.J. On sound generated aerodynamically: II. Turbulence as a source of sound Proc. Royal Society London 222 1954
- Sturm , M. , Carolus , T.H. Large Scale Inflow Distorsions as a Source Mechanism for Discrete Frequency Sound from Isolated Axial Fans 19th AIAA/CEAS Aeroacoustics Conference May 27 29 2013
- Reese , H. , Carolus , T. , Kato , C. Numerical prediction of the aeroacoustic sound sources in a low pressure axial fan with inflow distortion Fan Noise 2007