Calculation of the Acoustic Characteristics of the Flow of a Compressible Viscous Gas Over a Circular Cylinder

The generation of noise by the flow of a compressible viscous gas over a circular cylinder as a result of the formation of vortices in it and the separation of them from the surface of the cylinder was considered. The sound field of this flow was calculated using the method of simulation of large vo...

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Bibliographic Details
Published in:Journal of engineering physics and thermophysics 2022-09, Vol.95 (5), p.1239-1247
Main Authors: Volkov, K. N., Emel’yanov, V. N., Karpenko, A. G., Chernyshov, P. S.
Format: Article
Language:English
Subjects:
Acoustic properties
Acoustics
Circular cylinders
Classical Mechanics
Complex Systems
Compressibility
Direct numerical simulation
Engineering
Engineering Thermodynamics
Ffowcs Williams-Hawkings equation
Fluid flow
Gas flow
Heat and Mass Transfer
Industrial Chemistry/Chemical Engineering
Mathematical analysis
Noise generation
Numerical analysis
Reynolds number
Simulation methods
Sound fields
Thermodynamics
Vortices
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Summary:The generation of noise by the flow of a compressible viscous gas over a circular cylinder as a result of the formation of vortices in it and the separation of them from the surface of the cylinder was considered. The sound field of this flow was calculated using the method of simulation of large vortices, and its acoustic characteristics were determined using the method of acoustic analogy based on the solution of the Ffowcs Williams–Hawkings equation. On the basis of the direct numerical simulation data on the indicated flow, its regimes at diff erent Reynolds numbers were investigated. The results of calculation of the acoustic characteristics of this flow within the framework of the two- and three-dimensional approaches to the solution of the Ffowcs Williams–Hawkings equation were compared. A good agreement has been obtained between the calculated gasdynamic and acoustic characteristics of a gas flow over a circular cylinder and the corresponding experimental and calculation data available in the literature.
ISSN:1062-0125
1573-871X
DOI:10.1007/s10891-022-02591-y