Acoustic characterisation of double-orifice configurations by means of a LES-SI approach

A numerical study of the aeroacoustic properties of a pair of orifices placed in a duct is here presented. Two geometric configurations with two different distances in between the orifices have been analysed to consider conditions with or without tonal noise sources. A Large Eddy Simulation has been performed and validated with respect to experimental measurements for both aerodynamic and acoustic predictions. Data series from an acoustically excited LES have been post-processed through System Identification techniques to concurrently model noise sources and acoustic scattering matrix. The model of the noise obtained has been used as validation to confirm the good prediction of the acoustic scattering.     «

A numerical study of the aeroacoustic properties of a pair of orifices placed in a duct is here presented. Two geometric configurations with two different distances in between the orifices have been analysed to consider conditions with or without tonal noise sources. A Large Eddy Simulation has been performed and validated with respect to experimental measurements for both aerodynamic and acoustic predictions. Data series from an acoustically excited LES have been post-processed through System I...     »