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Simulation of the acoustics behind a wall due to a moving vehicle

In English

Författare

Summary, in English

The influence of a barrier on the acoustic field is investigated using an expansion of the compressible Navier-Stokes equations. Large Eddy Simulations (LES) is used to account for the acoustical sources and the equation for the acoustic density fluctuation accounts for the propagation of the acoustics waves. This combined approach enhances numerical efficiency while maintaining good accuracy. The problem under consideration is related to the spreading of noise due to a moving vehicle and the effects of a noise barrier on the Sound Pressure Level (SPL) and spectral composition. These parameters are computed for several configurations of the barrier in terms of height and distance from the vehicle. The main results show that there can be acoustic modes in resonance between the barrier and vehicle and that barrier height has an effect on SPL that is intuitive. Copyright

Avdelning/ar

Publiceringsår

2006

Språk

Engelska

Sidor

1960-1971

Publikation/Tidskrift/Serie

Collection of Technical Papers - 12th AIAA/CEAS Aeroacoustics Conference

Volym

3

Dokumenttyp

Konferensbidrag

Förlag

American Institute of Aeronautics and Astronautics

Ämne

  • Fluid Mechanics and Acoustics

Nyckelord

  • Sound Pressure Level (SPL)
  • Large Eddy Simulations (LES)
  • Acoustic density fluctuation
  • Noise barrier

Conference name

12th AIAA/CEAS Aeroacoustics Conference

Conference date

2006-05-08 - 2006-05-10

Conference place

Cambridge, MA, United States

Status

Published

ISBN/ISSN/Övrigt

  • ISBN: 1563478099