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- W4282553575 abstract "The paper is concerned with the effect of angle of attack on the interaction noise between a turbulent flow and a NACA 0012 airfoil. This experimental study considers an airfoil with a porous leading edge up to $10%$ of the chord and compares the noise levels to a solid airfoil leading edge at a Reynolds number of Re=2.5x10^5. Turbulence is generated by the means of a passive grid and the direct noise measurements are performed using a microphone array. The airfoil is instrumented for both steady and unsteady wall pressure measurements. The C_p distribution over the surface of the airfoil is considered up to large geometric angles of attack for both the solid and porous leading edge cases. From far-field noise measurement, it is found that radiated sound is reduced at small geometric angles of attack at low frequencies for the porous airfoil. At higher angles of attack the C_p distribution of the porous leading edge case appears to be similar with that of a stalled airfoil, suggesting porous leading edges at higher angles of attack stall earlier than a solid airfoil." @default.
- W4282553575 created "2022-06-14" @default.
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- W4282553575 date "2022-06-13" @default.
- W4282553575 modified "2023-09-27" @default.
- W4282553575 title "The effect of angle of attack on turbulence interaction noise with a porous leading edge" @default.
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- W4282553575 doi "https://doi.org/10.2514/6.2022-3095" @default.
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