Research>Flow Control >Aeroacoustics

Background

Aeroacoustics is the study of sound produced by the motion of air. There are two main goals of aeroacoustics when applied to aircraft: first, to reduce the amount of sound produced, second, to increase the amount of sound energy absorbed. For most aircraft applications, noise is just one of many design constraints and any noise control treatments have to be traded accordingly. For many applications, passive or semi passive noise treatments are acceptable, e.g. acoustic liners for jet engines. However, for some applications where the available volume for noise treatment is very small, e.g.on landing gear, there maybe advantages in implementing active flow control systems to reduce the production of noise. Active flow control systems may require significant amounts of power to operate and hence it is necessary to evaluate the additional engine noise due the required power generation in the overall equation. It should also be recognised that flow control for the simpler problem of separation control is still a relatively immature art, and hence the use of flow control for the more challenging problem of noise control is ambitious.

Projects

CADWIE