Numerical prediction of pipe flow noise and vibration at low Mach number

The numerical prediction of pipe flow noise and the associated vibration response of a straight duct of finite length is performed. The wall pressure distribution is decomposed into hydrodynamic and acoustic contributions. The response of the structure is estimated via a "blocked" approach using analytical modal Frequency Response Functions (FRFs) of a simply supported finite duct. Circular and rectangular cross-sections are investigated as specific cases in which material properties and dimensions, i.e. width and cross-sectional areas, remain identical.