Nicolas Pignier

Identification of noise sources on a realistic landing gear using numerical phased array methods applied to computational data

The aerodynamic sound sources on a realistic landing gear are investigated using numerical phased array methods, based on array data extracted from compressible Detached-Eddy Simulations of the flo ...

Aeroacoustic study of a submerged air inlet using an IDDES/FW-H approach and sound source modelling through direct numerical beamforming

The flow-generated sound from an air inlet at a low Mach number is studied using detached eddy simulation and direct numerical beamforming. The flow is solved through RANS and compressible detached ...

Pass-by noise signature of aerodynamic sound sources in urban environment : A numerical approach

A numerical methodology is presented to simulate the sound field generated by moving aerodynamic sound sources in a simplified urban environment. The framework is described step by step from source ...

Predicting the pass-by signature of vehicle sound sources including the influence of nearby built environment

A numerical methodology is presented aimed at evaluating the sound field generated by acoustic sources from ground vehicles using monopoles moving in a simplified urban environment. The approach includes reflection and scattering on nearby building surfaces, differentiating it from standard pass-by test simulations, which are performed on an ideal track in a free-field. In the example shown in this study, the sound sources consist of a group of incoherent monopoles representing the flow sound from a NACA air inlet, which were identified using numerical beamforming in a previous study. Other sources such as the engine or the exhaust could also be included as long as they can be modelled with one or more monopoles. Propagation is computed using a method previously developed by the authors, based on a point-to-point moving source Green’s function and a modified Kirchhoff integral under the Kirchhoff approximation to compute first- and second-order reflections on built surfaces. This methodology has the poten...