Intensification and suppression of jet noise sources in the vicinity of lifting surfaces

Theoretical and an experimental investigations of jet noise modification are carried out for the jet issuing in the vicinity of the wing. The effect of interaction between instability waves in the jet and flap solid boundaries has been studied. Expermental investigation of jet noise from a dual flow nozzles near a wing provides assessment of several parameters (chevrons on primary and secondary nozzles, distance between the trailing edge of the flap and the nozzle, distance between the plane of the wing to the jet axis, presence of the pylon, etc.) on jet noise installation effect.