Acoustic-Flow Interaction over an acoustic liner - Ref. 116/26/IR

Limited understanding of how acoustic waves interact with turbulent boundary layers over sound-absorbing surfaces leads to unexpected,unphysical results in inverse acoustic characterization. This project will combine experiments with high-fidelity lattice-Boltzmann very-largeeddysimulations to explain flow–acoustic interactions. Advanced data analysis will separate acoustic and hydrodynamic velocities near thewall. The numerical database will enable comparison of inverse methods, reveal the physical causes of anomalous results and supportphysicsbasedcorrections. It will also help model and predict the drag increase caused by acoustic–flow coupling. These findings will resolvescientific debate and pave the way for broadband, low-noise, low-drag acoustic metasurfaces, improving propulsion efficiency and reducingnoise in future, more sustainable aircraft engines.