Recent Advances in Flow-Induced Noise

Dear Colleagues,

Since Lighthill (1952) defined aerodynamic noise sources mathematically, the related areas of aeroacoustic research have made remarkable progress in understanding the noise generation mechanism in applications such as jet, fan, and turbomachinery flows and in developing high-fidelity computational aeroacoustic techniques. Recent advances in the related research areas may be highlighted in terms of two points. One is the extension of the relevant physical theory from aerodynamic noise to flow-induced noise. Lighthill developed his theory for the request of reducing jet noise in the aeronautics industry in the 1950s. Although most research funding still comes from the aeronautics industry, the application areas have become broader (e.g., high-speed vehicle noise, home appliance noise, wind-turbine noise, etc.). Recently, the underwater acoustic waves radiated from ships and submarines have gained a great deal of attention due to environmental issues. The investigation into this issue inevitably requires the extension of aerodynamic noise theory to include flow noise (e.g., cavitation noise). Another reason for the increase in interest is the dramatically increased computation resources available for the numerical investigation of aerodynamic noise generation and fluid dynamics. The increasingly resolved computation results of flow-induced noise help develop our understanding of noise generation mechanisms, which enlarges our current knowledge of flow-induced noise. In this respect, this Special Issue is devoted to the application of fundamental aerodynamic noise theory and computational flow-induced noise techniques. 

Prof. Dr. Cheolung Cheong
Dr. Hanshin Seol
Guest Editors

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