A feedback model of the edge tone, using the adjoint Orr–Sommerfeld equation

Nagy, Péter Tamás; Szabó, András; Paál, György

doi:10.1017/jfm.2021.47

Cited by 8 publications

(1 citation statement)

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“…Additionally, the eigenfunctions of the linearized Navier -Stokes equations are biorthogonal, meaning that for each mode, an adjoint mode exists, representing the sensitivity or excitability of the mode. Such an analysis has revealed that the two shear layers in the jets are the most sensitive regions [14]. This knowledge can be utilized to optimize the geometry to enhance or diminish the strength of oscillation.…”

Section: Linear Stability Analysismentioning

confidence: 99%

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

Nagy,

Szabó,

Paál

et al. 2023

J. Phys.: Conf. Ser.

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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.

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Section: Linear Stability Analysismentioning

confidence: 99%