Abstract
This special issue collects six papers based on research presented at the 23rd Workshop of the Aeroacoustics Specialists Committee of the CEAS, held from 26 to 27 September 2019 in Rome, Italy. The event, entitled “New Materials for Applications in Aeroacoustics”, was organized by the Department of Engineering of the Roma TRE University and co-sponsored by the European H2020 projects ANIMA (Aviation Noise Impact Management through Novel Approaches) and AERIALIST (AdvancEd aircRaft-noIse-AlLeviation devIceS using meTamaterials), and the American Institute of Aeronautics and Astronautics.
The workshop was focused on innovative active Palma and passive materials for the reduction of noise in aeroacoustic applications. In the last decade, considerable effort has been devoted to the identification of breakthrough concepts to achieve the substantial noise reduction required to guarantee the sustainable development of aeronautical transportation systems. The growing interest of the scientific community in the field of innovative noise reduction technologies for aeronautical applications is further confirmed by the considerable number of European projects dedicated to this theme. Primary goal of the workshop was to encourage the discussion and the cooperation of the research community on this key topic. The 23 presented works have covered aspects related to theoretical and numerical modeling, trailing-edge noise mitigation, manufacturing and experimental assessment and active and tunable concepts. In addition to the regular presentations, four keynote lectures were held: Wim Desmet (KU Leuven), “Locally resonant vibro-acoustic metamaterials for compact lightweight noise control engineering solutions”; Wonju Jeon (KAIST, South Korea), “Acoustic Metamaterials and Metasurfaces: Effect of Flow and Visco-thermal Losses”; Estelle Piot (ONERA Toulouse), “Advanced identification techniques and design tools applied to innovative aeroacoustic liners” and Francesco Asdrubali (Roma Tre University), “Sustainable materials and metamaterials for acoustical applications”.
I would like to thank Dr. Ganesh Raman, Editor-in-chief of the International Journal of Aeroacoustics, for providing this opportunity and all the necessary support. Special thanks to the scientific committee of the workshop for the valuable support in the revision of the papers.