Journal
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
Volume 127, Issue 2, Pages 710-719Publisher
ACOUSTICAL SOC AMER AMER INST PHYSICS
DOI: 10.1121/1.3273899
Keywords
acoustic wave propagation; aeroacoustics; Navier-Stokes equations; orifices (mechanical); pipe flow
Categories
Funding
- EMFO [Dnr AL 90B2004: 156660]
- Vinnova/Green Car [Dnr 2005-00059]
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Acoustic wave propagation in flow ducts is commonly modeled with time-domain non-linear Navier-Stokes equation methodologies. To reduce computational effort, investigations of a linearized approach in frequency domain are carried out. Calculations of sound wave propagation in a straight duct are presented with an orifice plate and a mean flow present. Results of transmission and reflections at the orifice are presented on a two-port scattering matrix form and are compared to measurements with good agreement. The wave propagation is modeled with a frequency domain linearized Navier-Stokes equation methodology. This methodology is found to be efficient for cases where the acoustic field does not alter the mean flow field, i.e., when whistling does not occur.
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