Abstract
We present pore-resolved direct numerical simulations (DNS) of turbulent flows grazing over acoustic liners with aerodynamically and/or acoustically optimised orifice configurations. Our DNS explore a large parameter space, studying different families of orifice geometries including the influence of orifice shape, orientation, and number. All flow cases show an increase in drag compared to the smooth wall. However, the added drag can be reduced by as much as ∼60%, as compared to conventional acoustic liners by simply changing the shape of the orifice or the orientation in the case of a non-circular orifice. Complementary acoustic simulations show that this drag reduction can be achieved while retaining the same noise reduction properties.
| Original language | English |
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| Title of host publication | 30th AIAA/CEAS Aeroacoustics Conference (2024) |
| Number of pages | 11 |
| ISBN (Electronic) | 978-1-62410-720-7 |
| DOIs | |
| Publication status | Published - 2024 |
| Event | 30th AIAA/CEAS Aeroacoustics Conference (2024) - Rome, Italy Duration: 4 Jun 2024 → 7 Jun 2024 Conference number: 30 |
Publication series
| Name | 30th AIAA/CEAS Aeroacoustics Conference, 2024 |
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Conference
| Conference | 30th AIAA/CEAS Aeroacoustics Conference (2024) |
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| Country/Territory | Italy |
| City | Rome |
| Period | 4/06/24 → 7/06/24 |
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-careOtherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.