Special Issue “Aeroacoustics and Noise Mitigation” (EditoriAL)

Other text in scientific journal, 2023

Aerospace, an open access journal operated by MDPI, recently released a Special Issue entitled “Aeroacoustics and Noise Mitigation”. Dr. Hua-Dong Yao from Chalmers University of Technology in Sweden served as the Guest Editor for this edition. In this Special Issue, readers can explore a collection of 11 articles that encompass various subjects, ranging from fundamental research to practical applications in the real world.
As the study of sound increasingly incorporates multidisciplinary physics, today, aeroacoustics has been expanded from the study of sound generation alone to a process that partially or completely combines sound generation, propagation, and mapping at receivers. Moreover, aeroacoustics is not limited to flows such as external noise pollution, footprint, and indoor environment quality, but also deals with flow–structure interaction (FSI), aero-vibro-acoustics, and damage detection and health monitoring of structures, etc. Due to the common basis of mathematical algorithms and physics, theories and methods developed for aeroacoustics with air as the medium have been applied to other fluid media such as water. The application scenarios are also not limited to aircraft, but extend to, for example, ground vehicles, HVAC (heating, ventilation and air conditioning) systems, wind turbines, ship propellers, and underwater vehicles. According to the instructions provided by ICAO (the International Civil Aviation Organization), aircraft noise mitigation can be achieved by noise source controlling, air traffic management, operating procedures, land-use planning, and relevant regulations and policies. However, with the emergence of clean-energy air vehicles such as flying cars and drones, available technologies and policies should be updated to meet the new demands and situations of rural/urban air mobility.