📋 Tender Overview
Funding
European
European Union
Duration
04/2023
-
03/2028
Status Ongoing
Geo-spatial type Infrastructure Node
Total project cost €1 499 125
EU Contribution €1 499 069
Project Acronym LINING
STRIA Roadmaps
Vehicle design and manufacturing (VDM)
Transport mode
Airborne icon
Transport policies
Safety/Security
Transport sectors
Passenger transport, Freight transport
Call for proposal ERC-2022-STG
Link to CORDIS
CORDIS ID: 101075903
Background & Policy context
Characterisation methods of sound-absorbing materials are affected by a lack of description of the interactions between acoustic waves and the turbulent boundary layer over the material surface. Funded by the European Research Council, the LINING project will investigate unexplained experimental findings discovered when a sound wave encounters turbulent air currents over surfaces treated with acoustic liners. Researchers will measure acoustic and hydrodynamic velocities near an acoustically treated surface with new experiments and high-fidelity numerical simulations. Describing how flow and acoustics interact over aircraft engine noise reduction technologies could pave the way for the development of future sound-absorbing surfaces with greater noise reduction and lower drag.
Objectives
The lack of fundamental knowledge of the interaction between an acoustic wave and a turbulent boundary layer grazing an acoustically treated surface, such as an acoustic liner, is the cause of unexpected and unphysical results found when performing the acoustic characterization of the sound absorbing surface with inverse eduction methods. This is because, in this field, acoustic and aerodynamic have never been fully coupled.
To fill this knowledge gap, the acoustic and hydrodynamic velocities near an acoustically treated surface must be measured. Since it cannot be done only with state-of-the-art experiments, because of hardware and field-of-view limitations, I propose to complement experiments with scale-resolved high-fidelity numerical simulations based on the lattice-Boltzmann very-large-eddy simulation method.
