Abstract
A technique for studying the aeroacoustic parameters of vortex rings with various diameters in an anechoic chamber is developed. The motion trajectories of vortex rings produced by a piston generator with nozzles with various exit diameters are studied. Spectral analysis of the noise of vortex rings for various distances from nozzles with various diameters is carried out. For the first time, the dependences of the fundamental radiation frequency on the time of a ring’s motion are obtained in dimensionless form. The data on noise from turbulent vortex rings confirm the conclusion that sound from rings with different diameters and velocities is emitted by the same mechanism.
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Original Russian Text © V.F. Kopiev, I.V. Khramtsov, M.Yu. Zaytsev, E.S. Cherenkova, O.Yu. Kustov, V.V. Palchikovskiy, 2018, published in Akusticheskii Zhurnal, 2018, Vol. 64, No. 4, pp. 499–507.
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Kopiev, V.F., Khramtsov, I.V., Zaytsev, M.Y. et al. Parametric Study of the Noise from Vortex Rings with Various Diameters. Acoust. Phys. 64, 503–510 (2018). https://doi.org/10.1134/S1063771018040097
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DOI: https://doi.org/10.1134/S1063771018040097