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| Influence of permeable wall on flow field and sound field of airfoil acoustic vortex interaction |
| Received:November 29, 2021 Revised:March 14, 2022 |
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| DOI：10.7511/jslx20211129001 |
| KeyWord:acoustic vortex interaction permeable wall trailing edge noise laminar separation bubble |
| Author | Institution |
| 史泽奇 |
南昌航空大学 飞行器工程学院, 南昌 ;江西省飞行器设计与气动仿真重点实验室, 南昌 |
| 刘勇 |
南昌航空大学 飞行器工程学院, 南昌 ;江西省飞行器设计与气动仿真重点实验室, 南昌 |
| 钟伯文 |
南昌航空大学 飞行器工程学院, 南昌 ;江西省飞行器设计与气动仿真重点实验室, 南昌 |
| 李克伟 |
南昌航空大学 飞行器工程学院, 南昌 ;江西省飞行器设计与气动仿真重点实验室, 南昌 |
| 李鑫 |
南昌航空大学 飞行器工程学院, 南昌 ;江西省飞行器设计与气动仿真重点实验室, 南昌 |
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| Abstract: |
| The permeable airfoil based on bionics has a good application prospect in suppression of turbulent aeroacoustic noise.Numerical calculation of NACA 0012 permeable and solid airfoil was carried out to obtain the aeroacoustic sound field and flow field under acoustic vortex interaction, and the effect of permeable wall on the flow field and sound field was analyzed.The results show that the permeable wall reduces the amplitudes of the sound pressure level of the main tonal noise and the total sound pressure level of the far field by decreasing the intensity of the sound source, and eliminates the discrete frequency tonal noise, but the noise directivity does not change significantly, compared with a solid airfoil.Further analysis of flow field shows that the permeable wall can reduce boundary layer disturbance and large-scale vortex strength at the trailing edge of the airfoil, and delay separation bubble transition and reattachment position under the condition that the influence of permeable wall on the aerodynamic performance of the airfoil is low. |
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