Near-Field Aeroacoustics of Spanwise Forcing on a Transonic Wing: A DNS Study
The transonic airflow around a supercritical wing with a shock wave is described via direct numerical simulations. Flow control for turbulent drag reduction is applied via streamwise traveling waves of spanwise velocity applied on a finite portion of the suction side. The near-field modifications ca...
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2025-01-01
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| author | Niccolò Berizzi Davide Gatti Giulio Soldati Sergio Pirozzoli Maurizio Quadrio |
| author_facet | Niccolò Berizzi Davide Gatti Giulio Soldati Sergio Pirozzoli Maurizio Quadrio |
| author_sort | Niccolò Berizzi |
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| description | The transonic airflow around a supercritical wing with a shock wave is described via direct numerical simulations. Flow control for turbulent drag reduction is applied via streamwise traveling waves of spanwise velocity applied on a finite portion of the suction side. The near-field modifications caused by the forcing are studied via the analysis of the wake profile downstream of the trailing edge. Moreover, for the first time, the effects of spanwise forcing on aeroacoustic noise are considered to establish whether active flow control for drag reduction could possibly increase noise. By extracting the acoustic signals on a circumference placed in the near-field around the wing and by studying them in terms of sound intensity and frequency content, it is found that noise intensity is not significantly increased by spanwise forcing and that frequency content is only minimally altered. Furthermore, if the angle of attack is reduced to take into account the increased lift and the reduced drag made possible by the control action, changes in the noise characteristics become negligible. |
| format | Article |
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| institution | Kabale University |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj-art-eaf4280aa79e4276969511a6c838dd9f2025-01-24T13:20:55ZengMDPI AGApplied Sciences2076-34172025-01-0115281410.3390/app15020814Near-Field Aeroacoustics of Spanwise Forcing on a Transonic Wing: A DNS StudyNiccolò Berizzi0Davide Gatti1Giulio Soldati2Sergio Pirozzoli3Maurizio Quadrio4Dipartimento di Scienze e Tecnologie Aerospaziali, Politecnico di Milano, Via La Masa 34, 20156 Milano, ItalyInstitute of Fluid Mechanics, Karlsruhe Institute of Technology, Kaiserstraße 10, 76131 Karlsruhe, GermanyDipartimento di Meccanica e Aeronautica, Università di Roma “La Sapienza”, Via Eudossiana 18, 00184 Rome, ItalyDipartimento di Meccanica e Aeronautica, Università di Roma “La Sapienza”, Via Eudossiana 18, 00184 Rome, ItalyDipartimento di Scienze e Tecnologie Aerospaziali, Politecnico di Milano, Via La Masa 34, 20156 Milano, ItalyThe transonic airflow around a supercritical wing with a shock wave is described via direct numerical simulations. Flow control for turbulent drag reduction is applied via streamwise traveling waves of spanwise velocity applied on a finite portion of the suction side. The near-field modifications caused by the forcing are studied via the analysis of the wake profile downstream of the trailing edge. Moreover, for the first time, the effects of spanwise forcing on aeroacoustic noise are considered to establish whether active flow control for drag reduction could possibly increase noise. By extracting the acoustic signals on a circumference placed in the near-field around the wing and by studying them in terms of sound intensity and frequency content, it is found that noise intensity is not significantly increased by spanwise forcing and that frequency content is only minimally altered. Furthermore, if the angle of attack is reduced to take into account the increased lift and the reduced drag made possible by the control action, changes in the noise characteristics become negligible.https://www.mdpi.com/2076-3417/15/2/814direct numerical simulationspanwise forcingaeroacoustics |
| spellingShingle | Niccolò Berizzi Davide Gatti Giulio Soldati Sergio Pirozzoli Maurizio Quadrio Near-Field Aeroacoustics of Spanwise Forcing on a Transonic Wing: A DNS Study Applied Sciences direct numerical simulation spanwise forcing aeroacoustics |
| title | Near-Field Aeroacoustics of Spanwise Forcing on a Transonic Wing: A DNS Study |
| title_full | Near-Field Aeroacoustics of Spanwise Forcing on a Transonic Wing: A DNS Study |
| title_fullStr | Near-Field Aeroacoustics of Spanwise Forcing on a Transonic Wing: A DNS Study |
| title_full_unstemmed | Near-Field Aeroacoustics of Spanwise Forcing on a Transonic Wing: A DNS Study |
| title_short | Near-Field Aeroacoustics of Spanwise Forcing on a Transonic Wing: A DNS Study |
| title_sort | near field aeroacoustics of spanwise forcing on a transonic wing a dns study |
| topic | direct numerical simulation spanwise forcing aeroacoustics |
| url | https://www.mdpi.com/2076-3417/15/2/814 |
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