This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Aero-Vibro-Acoustic Wind Noise-Simulation Based on the Flow around a Car
Technical Paper
2016-01-1804
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Aim of the ongoing development of passenger cars is to predict the interior acoustics early in the development process. A significant noise component results from the flow phenomena in the area of the side window. Wind noise is a physical problem that involves the three complicated aspects each governed by different physics: The complex turbulent flow field in the wake of the a-pillar and the side mirror is characterized by velocity and pressure fluctuations. The flow field generates sound which is transmitted into the passenger cabin. In addition to that, it excites the structure, resulting in a radiation of structure-borne noise into the interior of the car. Therefore, the sound generation is governed by fluid dynamics of the air flow. The sound transmission through the structure due to vibrations is determined by structural mechanics of the body structure. The sound propagation inside the cabin is influenced by interior room acoustics.
In the present work, different CFD simulations of the exterior flow were conducted to investigate the sound generation due to external air turbulence. For this purpose, a simplified model of an automobile was used. Additionally vibro and aeroacoustic simulations were conducted to solve the other two parts of the problem and to gain insight into the sound transmission into the passenger cabin.
Recommended Content
| Technical Paper | Combining Modeling Methods to Accurately Predict Wind Noise Contribution |
| Technical Paper | Automobile Aerodynamic Noise |
Authors
Topic
Citation
Becker, S., Nusser, K., and Oswald, M., "Aero-Vibro-Acoustic Wind Noise-Simulation Based on the Flow around a Car," SAE Technical Paper 2016-01-1804, 2016, https://doi.org/10.4271/2016-01-1804.Also In
References
- Aljure , D. , Rodriguez , I. , Lehmkhul , O. , Borrell , R. , and Assensi , O. Flow and turbulent structures around simplified car models Proceedings of 15th International Conference on Fluid Flow Technologies September 4 - 7, 2012 Budapest, Hungary 2012
- Ask , J. and Davidson , L. A numerical investigation of the flow past a generic side mirror and its impact on sound generation Fluid Eng D 131 6 2009
- Ask , J. , Davidson , L. Flow and dipole source evaluation of a generic SUV J. Fluid Eng. 132 5 051 111 2010
- Argulillat , B. , Ricot , D. , Bailly , C. , and Robert , G. Measured wavenumber: Frequency spectrum associated with acoustic and aerodynamic wall pressure fluctuations J Acoust Soc Am 128 4 1647 1655 2010
- Becker , S. , Hahn , C. , Kaltenbacher , M. , and Lerch , R. Flow-Induced Sound of Wall-Mounted Cylinders with Different Geometries AIAA Journal 46 9 2265 2281 2008
- Bremner , P. and Wilby , J. Aero-vibro-acoustics: Problem statement and methods for simulation-based design solution Proceedings of 8th AIAA/CEAS Aeroacoustics Conference 2002
- Bremner , P. Vibroacoustic source mechanisms under aeroacoustic loads Proceedings of 18th AIAA/CEAS Aeroacoustics Conference June 4 - 6, 2012 Colorado Springs (CO), USA 2012
- Caro , S. , Ramonda , A. , Prot , F. , Vergne , S. , and Pechabat , M. TBL noise generated by a simplified side mirror configuration and acoustic transfer through the window: Modeling using Actran and Fluent Proceedings of 12th AIAA/CEAS Aeroacoustics Conference 2006
- Corcos , G. Resolution of pressure in turbulence J. Acoust. Soc. Am. 35 2 192 199 1963
- Hartmann , M. , Ocker , J. , Lemke , T. , Mutzke , A. , Schwarz , V. , Tokuno , H. , Toppinga , R. , Unterlechner , P. , and Wickern , G. Wind noise caused by the A-pillar and the side mirror flow of a generic vehicle model Proceedings of 18th AIAA/CEAS Aeroacoustics Conference 2012
- Höld , R. , Brenneis , A. , Eberle , A. , Schwarz , V. , and Siegert , R. Numerical simulation of aeroacoustic sound generated by generic bodies placed on a plate: part 1 - prediction of aeroacoustic sources Proceedings of 5th AIAA/CEAS Aeroacoustics Conference 1999
- Hunt , J. , Wray , A. , Moin , P. Eddies, stream and convergence zones in turbulent flows Technical report CTR-S88 Center for Turbulent Research 1988
- Kaltenbacher , M. Advanced simulation tool for the design of sensors and actuators Procedia Engineering 5 597 600 2010
- Khalighi , B. , Iaccarino , G. , and Khalighi , Y. Automotive flow and acoustic predictions using Large Eddy Simulations Int J Fluid Mech Res 39 3 272 289 2012
- Khalighi , B. , Chen , K.-H. , Johnson , J. , Snegirev , A. , Shinder , J. , and Lupuleac , S. Computational and experimental investigation of the unsteady flow structures around automotive outside rear-view mirrors Int J Autom Tech 14 1 143 150 2013
- Krajnovic , S. , Davidson , L. Flow around a simplified car, part 1: Large eddy simulation J. Fluid Eng. 127 5 907 918 2005
- Krajnovic , S. The role of LES in unsteady ground vehicle aerodynamics Proceedings of 15th International Conference on Fluid Flow Technologies 2012
- Lepley , D. , Senthooran , S. , Hendriana , D. , and Frazer , T. Numerical Simulations and Measurements of Mirror-Induced Wind Noise SAE Int. J. Passeng. Cars - Mech. Syst. 2 1 1550 1562 2009 10.4271/2009-01-2236
- Lighthill , M.J. On sound generated aerodynamically I. General theory. Proc. Roy. Soc. A. 211 1107 1952
- Minguez , M. , Pasquetti , R. , Serre , E. High-order large-eddy simulation of flow over the ahmed body car model Phys Fluids 20 095 101 2008
- Müller , S. , Becker , S. , Biermeier , T. , Schafer , F. , Grabinger , J. , Kaltenbacher , M. , and Blanchet , D. Investigation of the Fluid-Structure Interaction and the Radiated Sound of Different Plate Structures Depending on Various Inflows Proceedings of the 15th AIAA/CEAS Aeroacoustics Conference 2009
- Müller , S. , Becker , S. , Gabriel , C. , Lerch , R. , Ullrich , F. Flow-induced input of sound to the interior of a simplified car model depending on various setup parameters AIAA Aeroacoustics Conf. 2013
- Müller , S. , Becker , S. , Gabriel , C. , Lerch , R. , Ullrich , F. Influence of the flow-induced structure-borne noise on the interior acoustics of a simplified car model Proceedings of European Conference on Noise Control 2012
- Müller , S. Fluid-Struktur-Akustik-Kopplung bei der Überströmung dünner Platten Dissertation University of Erlangen-Nürnberg 2015
- Murad , N. , Naser , J. , Alam , F. , and Watkins , S. Computational fluid dynamics study of vehicle A-pillar aero-acoustics Appl Acoust 74 6 882 896 2013
- Murata , O. , Kokubo , A. , Ichinose , K. , Kijima , T. , Horinouchi , N. , Iida , A. , and Kato , C. Measurements of aero-acoustic noise and pressure fluctuation generated by a door-mirror model placed on a flat plate Jap Soc Mech Eng B 71 710 2471 2479 2005
- Ullrich , F. et al. Investigations of sunroof buffeting in an idealised generic vehicle model Part I: Experimental results Proceedings of 14th AIAA/CEAS Aeroacoustics Conference 2008
- Sch¨afer , F. , Müller , S. , Uffinger , T. , Becker , S. , Grabinger , J. , and Kaltenbacher , M. Fluid-Structure-Acoustics Interaction of the Flow Past a Thin Flexible Structure AIAA 48 4 738 748 2010
- Siegert , R. , Schwarz , V. , and J. , R. Numerical simulation of aeroacoustic sound generated by generic bodies placed on a plate: part II - prediction of radiated sound pressure Proceedings of 5th AIAA/CEAS Aeroacoustics Conference 1999
- SAE Special Publication 1465 Aerodynamic Testing of Road Vehicles in Open Jet Wind Tunnels Warrendale Society of Automotive Engineers, Inc. 1999
- Vadavalli , V. , Moreau , S. , and Atalla , N. Statistical properties of pressure loadings and vibroacoustic response of a simplified side glass induced by the flow over generic flow-deflector and side-mirror Proceedings of 17th AIAA/CEAS Aeroacoustics Conference 2011
- Van Herpe , F. , Bordji , M. , Baresch , D. , and Lafon , P. Wavenumber-frequency analysis of the wall pressure fluctuations in the wake of a car side mirror Proceedings of 17th AIAA/CEAS Aeroacoustics Conference 2011
- Van Herpe , F. , Duarte , L. , and Lafon , P. Sound vs. pseudo-sound contributions to the wind noise inside a car cabin: A modal approach Proceedings of 18th AIAA/CEAS Aeroacoustics Conference 2012