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On the Possibilities and Limitations of Wind Noise Testing in the Aerodynamical Wind Tunnel at Volvo Cars

Olga Roditcheva ; Lennart Löfdahl (Institutionen för tillämpad mekanik, Fordonsteknik och autonoma system) ; Simone Sebben (Institutionen för tillämpad mekanik, Fordonsteknik och autonoma system) ; Pär Harling Ceng ; Holger Bernhardsson
9th International Styrian Noise, Vibration and Harshness Congress: The European Automotive Noise Conference, ISNVH 2016; Grazer CongressSparkassenplatz 1Graz; Austria; 22 June 2016 through 24 June 2016 Vol. 2016-June (2016), June,
[Konferensbidrag, refereegranskat]

This paper presents an experimental study of aeroacoustical sound sources generated by the turbulent flow around the side mirror of a Volvo V70. Measurements were carried out at the Volvo Cars aerodynamical wind tunnel (PVT) and at the aeroacoustical wind tunnel of Stuttgart University (FKFS). Several different measurement techniques were applied in both tunnels and the results were compared to each other. The configurations considered here were: side mirror with a cord and without the cord. The results discussed in this paper include intensity probe measurements in the flow around the side mirror, sound source localization with beamforming technique using a three-dimensional spherical array as well as standard measurements inside the car with an artificial head. This experimental study focused on understanding the differences between testing at the PVT and FKFS. It aimed to answer the question about how to overcome the difficulties in measuring small wind noise contributions in the aerodynamical wind tunnel with poor aeroacoustical treatment.



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Denna post skapades 2016-12-19. Senast ändrad 2017-01-20.
CPL Pubid: 246212

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Fordonsteknik och autonoma system (2010-2017)

Ämnesområden

Transport
Innovation och entreprenörskap (nyttiggörande)
Farkostteknik
Strömningsmekanik och akustik

Chalmers infrastruktur