Numerical Analysis of Metal-Foam Application for Trailing Edge Noise Reduction

Conference paper (2019)

Authors

C. Teruna Wind Energy - Aerospace Engineering
F.A. Manegar University of Siegen
F. Avallone Wind Energy - Aerospace Engineering
D. Casalino Wind Energy - Aerospace Engineering
D. Ragni Wind Energy - Aerospace Engineering
A. Rubio Carpio Aircraft Noise and Climate Effects - Aerospace Engineering
Thomas Carolus University of Siegen
Research Group
Wind Energy (Aerospace Engineering) (TU Delft)
Copyright: © 2019 C. Teruna, F.A. Manegar, F. Avallone, D. Casalino, D. Ragni, A. Rubio Carpio, Thomas Carolus
DOI: https://doi.org/10.2514/6.2019-2650
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Published Date

2019

Language

English

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Faculty

Aerospace Engineering

Department

Flow Physics and Technology

Research Group

Wind Energy

Abstract

This manuscript presents a numerical investigation of the turbulent boundary layer-trailing edge (TBL-TE) noise reduction with an open-cell porous material. The implementation of the porous media is verified by emulating a facility for characterizing the flow resistivity of the porous material. Subsequently, the porous media is applied on the trailing edge of a NACA 0018 airfoil to examine its capability to mitigate TBL-TE noise. The airfoil is set at zero angle of attack and the chord-based Reynolds number is 2.8 × 10 5. Boundary layer profiles and integral boundary layer quantities have been compared with reference experimental data. The noise reduction obtained with the porous trailing edge at low to mid frequency ranges has been found to be in good agreement with the experiment. However, the simulation is unable to predict the noise increase at high frequency, which is considered due to the neglected surface roughness effects in the adopted porous media model. Conventional beamforming is also used to locate the dominant sound sources. In contrast with the solid trailing edge case, it has been found that the solid-porous interface is the location of the dominant sound source for the porous trailing edge case.

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