by Christiane Montavon, CFX The physics of aero-acoustics makes
modeling a challenging task; pressure fluctuations produce
noise, which propagates over large distances far from its
source. To simulate these phenomena, it is necessary both to
model the detailed fluctuating flow in the neighborhood of the
sound source, and the far-field propagation effects. The primary
aim of the EU Alessia Project has been to develop software tools
for the simulation of fluctuating flows, with particular focus
on flow-induced acoustics. The partners in the project are CFX,
Technical University of Munich, Shell, Alfa Laval, LMS and Fiat
Corporate Research.