Abstract
The mechanism of acoustic oscillation generation due to the formation of stable vortex structures in a medium in motion is considered with reference of the example of impinging swirling air flow. It is established that, as the swirling flow attains a limiting flow-rate velocity, the amplitude frequency characteristic of the acoustic oscillations in the hydromechanical system restructures itself. The discovered effect of the acoustic oscillation self-adjustment manifests itself in the resonance amplification of the amplitudes of the vortex chamber eigenfrequencies at the expense of the absorption of the acoustic oscillation spectrum components generated by the vortex structure of the flow.
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Original Russian Text © O.V. Mitrofanova, I.G. Pozdeeva, 2015, published in Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, 2015, Vol. 50, No. 5, pp. 54–63.
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Mitrofanova, O.V., Pozdeeva, I.G. Investigation of the acoustic oscillation self-adjustment mechanism in impinging swirling flows. Fluid Dyn 50, 646–654 (2015). https://doi.org/10.1134/S0015462815050063
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DOI: https://doi.org/10.1134/S0015462815050063