The effect of angle of attack on turbulence interaction noise with a porous leading edge
| Autor: | Luke Bowen, Alper Celik, Mahdi Azarpeyvand, Michelle F. Westin |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Bowen, L L, Celik, A, Azarpeyvand, M & Westin, M F 2022, The effect of angle of attack on turbulence interaction noise with a porous leading edge . in 28th AIAA/CEAS Aeroacoustics Conference, 2022 : Session: Acoustic/Fluid Dynamics Interactions IX: Misc ., AIAA 2022-3095, 28th AIAA/CEAS Aeroacoustics Conference, 2022, American Institute of Aeronautics and Astronautics Inc. (AIAA), 28th AIAA/CEAS Aeroacoustics 2022 Conference, Southampton, United Kingdom, 14/06/22 . https://doi.org/10.2514/6.2022-3095 |
| DOI: | 10.2514/6.2022-3095 |
| Popis: | 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 Cp 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 Cp 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. |
| Databáze: | OpenAIRE |
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