파워흐름해석법을 이용한 평판의 난류경계층소음해석

Objects in motion disturb the surrounding fluid to produce hydrodynamic noise. While the noise sources due to purturbed fluid itself can be predicted using acoustic analogy method, sources caused by vibration beneath turbulent boundary layer on surface require fluid-structure interaction analysis to be considered; turbulent boundary layer noise. In this paper, the Energy Flow Analysis(EFA) method for vibro-acoustic prediction combined with input power estimation method is used to predict the radiated noise due to turbulent flow on a structure; a flat plate in an anechoic wind tunnel. The input vibrational energy is calculated from spectrum of wall pressure fluctuation beneath a turbulent boundary layer. Numerical simulations show reliable results and usability for analysis of various thickness and materials.