Abstract:
This Report describes a theoretical investigation of the noise generated when turbulence interacts with a slot between a wing and flap. The slot is modelled by the region between two overlapping, semi-infinite rigid planes representing the wing and flap, and sound is produced when turbulence convects above, below or through the slot. The analysis determines the dependence of the radiated sound on the characteristic turbulence velocity, the effect of forward flight on the field shape, and properties of the field radiated to the side of the aircraft flight path.
