Affiliated faculty

André V. G. Cavalieri

Flávio J. Silvestre

Roberto Gil

William R. Wolf (Professor, Unicamp)

Peter Jordan (Research scientist, Université de Poitiers)

Justin W. Jaworski (Lehigh University)

Students

Petrônio Nogueira (Undergraduate, ITA)

Funding source: Inova Aerodefesa (FINEP/Embraer), project entitled "Advanced configuration for noise reduction".

Description

The increase of the bypass ratio of aeronautical jet engines, with benefits in fuel consumption, has led to the concept of the modern Ultra-High Bypass Ratio (UHBPR) engines. The greater diameter of such engines leads to lower jet-wing distances, increasing the aerodynamic and aeroacoustic interactions between the turbulent jet and the neighbouring surfaces. A wing in the vicinity of a jet can increase substantially the radiated sound due to the said interaction, which will lead to significant acoustic scattering. On the other hand, new aircraft could use alternative jet-wing configurations to reduce the radiated sound. The problem of a jet installed near a wing has been modelled by the calculation of the acoustic scattering by the wing, using models of sound sources developped in the free-jet study. Current work involves the proposition of new concepts capable of reducing the radiated sound, such as elastic and/or porous trailing edges.