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- W2134362029 abstract "ow{permeable materials is a known method for the reduction of airfoil aeroacoustic noise. Detailed acoustic measurements on the noise generation at the leading edge of porous airfoil models were performed in an open jet wind tunnel using microphone array measurement techniques and three{dimensional beamforming algorithms. A set of three dierent grids provided the required inow turbulence. Measurement results are presented for the noise generated at the leading edge of porous airfoils, which are characterized by their air ow resistivity, compared to a non{porous reference airfoil. The comparison of the leading edge noise spectra measured for the reference airfoil with theory yields good agreement. The results of the acoustic measurements show that porous airfoils with low air ow resistivities lead to a noticeable noise reduction, which is assumed to be caused by the larger pores of these materials compared to porous airfoils with a higher air ow resistivity." @default.
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- W2134362029 date "2011-06-05" @default.
- W2134362029 modified "2023-10-02" @default.
- W2134362029 title "Experimental assessment of the noise generated at the leading edge of porous airfoils using microphone array techniques" @default.
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- W2134362029 doi "https://doi.org/10.2514/6.2011-2713" @default.
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