The engineoverthewing noise problem
Abstract
The problem of diffraction of a sound wave by a strip in a moving fluid is investigated. The sound source is a line source which is at a fixed finite distance from the strip. This system is in a moving subsonic fluid, and a vortex sheet is assumed to be attached to the trailing edge. The above problem is supposed to be a theoretical model for the situation when an engine is at a fixed distance and orientation above an aircraft wing, the aircraft being in flight.
 Publication:

Journal of Sound Vibration
 Pub Date:
 February 1977
 DOI:
 10.1016/0022460X(77)90503X
 Bibcode:
 1977JSV....50..553R
 Keywords:

 Aerodynamic Configurations;
 Aircraft Noise;
 Sound Waves;
 Subsonic Flow;
 Vortex Sheets;
 Wave Diffraction;
 Acoustic Attenuation;
 Asymptotic Methods;
 Boundary Value Problems;
 Fourier Transformation;
 Fredholm Equations;
 Mathematical Models;
 Noise Reduction;
 Acoustics