Wave dispersion of a gas in a liquid

Ганиев, Р. Ф.; Zhebynev, D. A.; Korneev, A. S.; Ukrainskii, L. E.

doi:10.1134/s0015462808020142

Cited by 16 publications

(6 citation statements)

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“…3. In the same figure the experimental characteristic is presented according to the data [2]. A maximum calculated fluctuation amplitude is observable on the frequency f = 860 Hz.…”

Section: Resultsmentioning

confidence: 93%

“…2 for the following characteristic sections: z = 2 mm, or the section of supply orifices (middle of the CD region in Fig. 1), and z = 45 mm, or the section in which the pressure transducer was located in the experiment [2]. At a temperature of 20 ∘ C the saturated water vapor pressure p sat = 2.3 kPa [12].…”

Section: Resultsmentioning

confidence: 99%

“…The liquid flow rate Q = 17.8 dm 3 /min and the pressure at the exit p out = 10 5 Pa. These parameters correspond to the conditions of the experiment [2]. The no-slip conditions were imposed on the solid walls AB, BC, DE, EF, and FG ( Fig.…”

Section: Mathematical Modelmentioning

confidence: 99%

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Mathematical simulation of hydrodynamic generators of oscillations

Korneev¹

2013

Fluid Dyn

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Unsteady turbulent swirled water flow in a channel in the presence of cavitation is calculated. It is shown that in the near-axial channel zone a fluctuating vapor region, or cavity, arises and variations in the cavity shape and dimensions lead to the onset of undamped pressure fluctuations. The amplitude-frequency characteristics of the oscillations are obtained in different channel cross-sections. The amplitude maximum position in the channel expansion zone is in agreement with the available experimental data. The dynamics of toroidal vortices formed in the hydrodynamic generator channel and in the expansion zone at its exit are established.Hydrodynamic generators of oscillations [1-3] produce waves when a fluid flows through channels of certain shape and dimensions. These generators have no any movable elements, which provides their reliability and service life. However, the mechanism of the pressure fluctuation onset has not been conclusively determined. It is noticed that these oscillations can be generated due to separation of toroidal vortices occurring in the channel [3] or as a consequence of the precession of a curved vortex core around the axis of symmetry of the chamber [4]. The purpose of this study is to numerically investigate the cavitation effect on the process of the pressure fluctuation onset in hydrodynamic vortex generators.

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“…3. In the same figure the experimental characteristic is presented according to the data [2]. A maximum calculated fluctuation amplitude is observable on the frequency f = 860 Hz.…”

Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

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Mathematical simulation of hydrodynamic generators of oscillations

Korneev¹

2013

Fluid Dyn

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“…One or another oscillation generation mechanism can be predominant depending on the hydrodynamic generator geometry and the operating regime. In accordance with the configuration of the experimental setup used [4], the wave disperser is mounted vertically at the lower part of a water tank. The flow rate Q w of water continuously pumped through the disperser depends on the pressure at the disperser entry and on the geometrical dimensions of the disperser (Fig.…”

Section: Operating Principle Of the Wave Disperser Of A Gas In A Liquidmentioning

confidence: 99%

“…The wave technique of gas dispersion in a liquid [4] was developed in the Scientific Center of Nonlinear Wave Mechanics and Technology of the Russian Academy of Sciences. The method is based on the gas flow shattering into small-size bubbles by means of pressure pulses produced by waves in the liquid which propagate from a hydrodynamic oscillation generator [5].…”

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confidence: 99%

Generator geometry effect on wave dispersion of a gas in a liquid

Korneev

2016

Fluid Dyn

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The influence of the channel diameter and length of the hydrodynamic oscillation generator on gas bubble dimensions in the case of wave dispersion of a gas in a liquid is experimentally investigated. The technique of measuring the bubble diameters based upon the computer analysis of the gas-liquid jet photos is presented. It is shown that on the gas flow rate range from 0.5 to 32 dm 3 /min the mean diameter of the gas bubbles produced by wave dispersers in water is estimated by an interval from 0.45 to 0.75 mm in optimum performance regimes.

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