What is it about?
Porous metals could potentially be used as acoustic liners to damp aircraft engine noise. We test the sound absorption of porous metals with different structures and porosities under air flow conditions. It finds that the effect of air flow on the sound adsorption of porous metals depends on the pore structure and porosity.
Featured Image
Why is it important?
Porous metals have potential applications as acoustic liners for noise reduction operating under adverse conditions such as high temperatures and high pressures. However, the effect of airflow on the acoustic properties of porous metals is not clear. By clarifying this, we aim to use porous metals for noise reduction in aircraft engines.
Perspectives
Recent developments in synthesis of porous metals have made it possible to produce them for specific applications to improve sound absorption. In the future, it will be possible to design porous metals with high sound absorbing performance in the presence of airflow as well as in the absence of airflow.
Hirofumi Daiguji
Read the Original
This page is a summary of: Sound Absorption Properties of Porous Metals Under Grazing Flow Conditions, AIAA Journal, April 2022, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/1.j060872.
You can read the full text:
Contributors
The following have contributed to this page
