On a Uniform Rotor-Stator Wake-Interaction Noise Model based on a Mode-Matching Technique
Résumé
The proposed paper deals with the analytical modeling of the noise generated by rotor wakes impinging on a row of outlet guide vanes in a ducted subsonic axial-flow fan architecture. The present analytical approach is believed a consistent alternative to numerical methods, especially at the early design stage. The analytical modeling consists in convecting a wake model through the stator and applying a mode-matching technique on its interfaces to determine the generated acoustic waves. This original technique allows introducing simply the cascade effect in a two-dimensional unwrapped representation of the stator in Cartesian coordinates. Its interest is that it can be easily transposed to a three-dimensional annular cascade in cylindrical coordinates.