Aeroacoustic Tonal Noise: Theoretical and Practical Approaches for Flow and Sound Analysis

Abstract

Aeroacoustic tonal noise, often caused by self-excited flow oscillations, represents a significant challenge in various engineering applications. One prominent example is the cavity tone, responsible for undesirable sound emissions from gaps found on the surfaces of vehicles, door gaps, and pantographs of trains. A similar configuration, known as the edge tone, appears in musical instruments. This paper aims at presenting a comprehensive framework consisting of practical and theoretical tools to analyze these complex flows and the resulting emitted sound. These tools can facilitate the development of mitigation strategies and the optimization of design parameters to minimize unwanted noise emissions.