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Acoustical Physics
Erschienen in: Acoustical Physics 5/2020

01.09.2020 | ATMOSPHERIC AND AEROACOUSTICS

Using the Correlation Model of Random Quadrupoles of Sources to Calculate the Efficiency of Turbulent Jet Noise Screening with Geometric Diffraction Theory

verfasst von: S. L. Denisov, V. F. Kopiev, N. N. Ostrikov, G. A. Faranosov, S. A. Chernyshev

Erschienen in: Acoustical Physics | Ausgabe 5/2020

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Abstract

The paper presents the results of a computational–experimental study of jet noise reduction using the screening effect. According to correlation theory, the noise sources of a single circular jet are represented by a set of uncorrelated quadrupoles. Using the basic relations of geometric diffraction theory (GDT), expressions are obtained for the sound field emitted by a point quadrupole source located near an acoustically rigid infinite half-plane. Using the expressions obtained in the framework of the GDT, the correlation model of the jet noise sources was adapted to the calculation of the sound field in the presence of a flat rectangular screen. A comparison of the calculated and experimentally measured spectra of sound pressure levels, performed at a given jet velocity and various screen positions, showed good qualitative, and for certain observation angles, quantitative agreement.
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Metadaten
Titel
Using the Correlation Model of Random Quadrupoles of Sources to Calculate the Efficiency of Turbulent Jet Noise Screening with Geometric Diffraction Theory
verfasst von
S. L. Denisov
V. F. Kopiev
N. N. Ostrikov
G. A. Faranosov
S. A. Chernyshev
Publikationsdatum
01.09.2020
Verlag
Pleiades Publishing
Erschienen in
Acoustical Physics / Ausgabe 5/2020
Print ISSN: 1063-7710
Elektronische ISSN: 1562-6865
DOI
https://doi.org/10.1134/S1063771020050024

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