1

MacimProject 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: DPI2000-0431-P4-03 • Period: 28/05/2001 - 27/05/2004 • 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 IAcoustic response of a train

5

Results IIAcoustic response of a wing