doi:
UDK: 534.21 : 534.612

VALIDATION AND VERIFICATION OF THE ACOUSTIC MODEL ON THE PROBLEM OF FLOW AROUND A ROUND CYLINDER

Тряскин Н. В., Ливеринова М. А.
Article language: русский

Annotation

The development and improvement of numerical methods for calculating turbulent noise is an actual problem that solves a number of important issues: optimization of constructions to reduce noise and acoustic pollution, determination of sound pressure levels using a mathematical experiment, the technical implementation of which is more economical than a physical experiment. This work is aimed at validating and verifying the acoustic model for the problem of flow around a circular cylinder. The paper presents a review of the literature devoted to the study of hydrodynamic noise. The problem is solved by the method of averaging the Navier-Stokes equations and by the method of large vortices for compressible and incompressible flows. At the initial stage a grid-independent solution was determined for the drag coefficient for the cylinder, and the initial and boundary conditions were worked out. To recalculate the acoustic characteristics from the near field to the far field, the Fox Williams-Hawkings method for three control surfaces and Curls analogy were used. In the main part of the work, the spectra of sound pressure levels for all considered cases are constructed and analyzed. The obtained results are compared with experimental data. In conclusion the main results of the work are formulated. Good agreement between the obtained results and the experiment is noted. Keywords: CFD, numerical simulation, RANS, LES, acoustic analogies, Curle analogy, FWH method, flow around a cylinder, hydrodynamical noise

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