Article

Noise Reduction by Local Application of Porous Material within Aeronautical Context (de)

Authors

* Presenting author
Day / Time: 06.03.2023, 13:25-13:50
Room: Saal X 3-4
Typ: Vorkolloquium
Session: Vorkolloquium: Methoden in der Flugzeugakustik
Abstract: Besides the noise produced by aircraft engines, airframe noise is important in certain flight phases (e.g., landing phase). Airframe noise can be defined as sound generated by the interaction between a turbulent flow and the aircraft's geometry (e.g., landing gear noise, flap side-edge noise, or noise generated at a wing’s trailing edge). In this numerical contribution, the local application of porous material is considered for the reduction of the sound produced by the wing's trailing-edge. Local application here means substituting the latter part near the wing's trailing-edge with a porous inset. The considered wings consist of symmetric and asymmetric profiles, as well as one with a highly deflected flap. Results are presented and the advantages/disadvantages of noise reduction by porous material are discussed.
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