Mitrofanova, O. V.; Pozdeeva, I. G. Investigation of the acoustic oscillation self-adjustment mechanism in impinging swirling flows. (English. Russian original) Zbl 1333.76008 Fluid Dyn. 50, No. 5, 646-654 (2015); translation from Izv. Ross. Akad. Nauk, Mekh. Zhidk. Gaza 2015, No. 5, 54-63 (2015). Summary: 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. MSC: 76-05 Experimental work for problems pertaining to fluid mechanics 76Q05 Hydro- and aero-acoustics Keywords:vortex structures; hydromechanical system; impinging flows; acoustic oscillations; resonance; self-adjustment effect × Cite Format Result Cite Review PDF Full Text: DOI References: [1] D.I. Blokhintsev, Acoustics of InhomogeneousMedia in Motion [in Russian], Nauka, Moscow (1981). [2] B. Vonnegut, “A VortexWhistle,” J. Acoust. Soc. Amer. 26, 18 (1954). · doi:10.1121/1.1907282 [3] R.C. Chanaud, “Experiments Concerning the VortexWhistle,” J. Acoust. Soc. Amer. 35, 953 (1963). · doi:10.1121/1.1918639 [4] Yu.A. Knysh and S.V. Lukachev, “Experimental Investigation of a Vortex Sound Generator,” Akust. Zh. 23, 776 (1977). [5] O.V. Mitrofanova, P.P. Egortsov, L.S. Kokorev, V.B. Kruglov, and A.I. Chernov, “Investigation of the Acoustic Oscillation Mechanism in Swirling Flows,” Teplofiz. Vys. Temp. 48, 241 (2010). [6] O.V. Mitrofanova, A.B. Kruglov, V.B. Kruglov, and I.G. Pozdeeva, “Investigation of the Topological Features of Impinging Swirling Jets,” Teplovye Protsessy v Mekhanike No. 10, 434 (2010). [7] O.V. Mitrofanova, I.G. Pozdeeva, A.B. Kruglov, and V.B. Kruglov, “Comprehensive Investigation of the Effect of Generation of Large-Scale Vortex Formations in Nuclear Reactor Coolants. Part II. Experimental Investigations of Impinging Swirling Flows,” Yadernaya Fizika Inzhiniring 3(2), 112 (2012). [8] O.V. Mitrofanova, Fluid Dynamics and Heat Transfer in Swirling Flows in the Channels of Nuclear Power Plants [in Russian], Fizmatlit, Moscow (2010). [9] O.V. Mitrofanova, L.S. Kokorev, and V.A. Tumol’skii, “Acoustic Method of Investigating the Vortex Structure of an Impinging Swirling Jet,” in: Problems of Gasdynamics and Heat and Mass Transfer in Power Plants. Proceedings of 16th School-Workshop under Supervision of Academician A.I. Leont’ev. Vol. 2 [in Russian], Moscow Energy Institute, Moscow (2007), p. 505. [10] Novikov, I. I.; Abramovich, G. N.; Klyachko, L. A., The Law of the Fluid Flow Rate in a Swirling Flow (Effect of a Maximum Flow Rate of a Swirling Fluid Flow) (1990) [11] L.F. Lependin, Acoustics [in Russian], Vysshaya Shkola, Moscow (1978). This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. In some cases that data have been complemented/enhanced by data from zbMATH Open. This attempts to reflect the references listed in the original paper as accurately as possible without claiming completeness or a perfect matching.