A frequency domain linearized Navier-Stokes equations approach to acoustic propagation in flow ducts with sharp edges

作者：Kierkegaard Axel^*; Boij Susann; Efraimsson Gunilla

来源：Journal of the Acoustical Society of America, 2010, 127(2): 710-719.

DOI：10.1121/1.3273899

• acoustic wave propagation
• aeroacoustics
• Navier-Stokes equations
• orifices (mechanical)
• pipe flow

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.

• 出版日期2010-2