1 Macim Project data Title: Modelos de aeroacústica para la reducción del impacto medio-ambiental del ruido aerodinámico generado por vehículos Project.

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1 Macim Project data Title: Modelos de aeroacústica para la reducción del impacto medio-ambiental del ruido aerodinámico generado por vehículos Project type: Proyecto del Ministerio de Ciencia y Tecnología, programa P4 Reference: DPI P4-03 Period: 28/05/ /05/2004 Collaborators: Oriol Guasch

2 Objectives To propose a model to approximate sound generated by turbulent low-Mach flows To test different LES turbulence models To solve the flow equations until audible frequencies To obtain the aerodynamic sound

3 Key numerical ingredients Algorithm based on Lighthill’s acoustic analogy Stabilized FEM for incompressible flows Efficient Fourier transform of the sound source Stabilized FEM for the Helmholtz equation

4 Results I Acoustic response of a train

5 Results II Acoustic response of a wing