Experimental investigation of thermal processes in the multi-ring Couette system with counter rotation of cylinders

Mamonov, V. N.; Назаров, А. Д.; Серов, А. Ф.; Терехов, В. И.

doi:10.1134/s0869864316010157

Cited by 8 publications

(5 citation statements)

References 3 publications

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“…This work continues the authors' research [1][2][3][4][5][6], presenting the results of experiments on the dependence of the power generated by such a heat generator on the relative angular velocity of rotation, the geometry of the proposed design and the viscosity of the working fluid. These experiments demonstrate that with a viscosity of the working fluid (6-25) • 10 -6 m 2 /s and with a relative rotational velocity of the rotors with a frequency of (4-5) Hz, the heat generator of the proposed design can reach a specific power that is significant for practical use (150-250) kW/m 3 .…”

Section: Introductionsupporting

confidence: 55%

Flow regimes in a multi-gap circular Couette-Taylor system with opposite rotating cylinders

Серов

Mamonov

Назаров

et al. 2021

J. Phys.: Conf. Ser.

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This work investigates the flow structure in the gaps of a multi-cylinder circular Couette-Taylor system, which is a model of a two-rotor heat generator. The initial information for studying the flow structure was data on the magnitude of the resistance torque to rotors opposed rotation, as well as on the nature of the amplitude-frequency spectrum of pulsations of this torque, depending on the viscosity of the working fluid and the rotational speed of the heat generator rotors. The obtained data allow comparing the nature of hydrodynamic processes in the single and obtained multi-gap circular space of Couette-Taylor and calculating the parameters of structural formations in the multi-gap working space of the heat generator. At relative rotational speeds of rotors (3-50) rad/s, the main energy of flow pulsations (up to 90%) is found in the amplitude-frequency spectra in the frequency range (12-70) Hz. It is associated with vortices first described by Taylor, which are extended low-frequency regularly alternating spirals and vortex structures with right and left rotation in the region of higher frequencies (200– 500) Hz; their frequency is determined by the width of the annular gaps of the multi-cylinder system.

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Section: Introductionsupporting

confidence: 55%

Flow regimes in a multi-gap circular Couette-Taylor system with opposite rotating cylinders

Серов

Mamonov

Назаров

et al. 2021

J. Phys.: Conf. Ser.

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“…where The determination of the thermal power from the measured total moment was confirmed experimentally [2]. The total torque of resistance to rotation was transferred through a lever arm of 110 mm length to the strain gauge of an analog dynamometer 5 (Fig.…”

Section: Methodsmentioning

confidence: 82%

“…The signals from the temperature sensors were fed through the microprocessor-based data acquisition and pre-processing unit 11 to the computer for final processing and storage. A more complete description of the installation and the measurement procedure can be found in [2].…”

Section: Methodsmentioning

confidence: 99%

Resistance force pulsations of annular flow in the Couette-Taylor system with counter-rotating cylinders

et al. 2019

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The paper presents the results of an experimental study of the Couette-Taylor flow fluctuations in a ring channel with oppositely rotating multicylinder rotors. Experiments were carried out using water-glycerine solutions as a working fluid. The rotation resistance moment and its pulsations were investigated, using the system for measuring the torque resistance of rotation of rotors, made in the form of a digital dynamometer based on a tension sensor. The investigations made it possible to establish that the classic dependence of the appearance of Taylor vortices is observed in the slit flow of a multicylinder system rotating oppositely. It was shown that in the range of Reynolds numbers Re = (100 – 500), pulsations of dissipative processes with variable frequency and amplitude up to 10% of the mean value of rotation resistance are observed.

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“…The article which continues to [2] deals with an attempt to study the features of a viscous liquid flow in a multi-ring Couette system with rotating towards each other coaxial cylinders analyzing rotation resistance moment energy spectra for these cylinders. An experimental setup sceme and a photograph of a main part -heat generator with milticilyndrical rotor system -are shown on the figure 1.…”

Section: Resultsmentioning

confidence: 99%

“…Use of mechanical power of wind rotors with vertical axis for driving liquid heat generators takes special place. In particular, it is of interest to consider a device, where the heat is released in a liquid volume placed in the narrow annular gap between the coaxial rotating towards each other cylinders, as a such heat generator [1,2].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of rotation resistance moment energy spectra in multicylindrical circular Couette system with independently rotating cylinders

2017

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Abstract. The torque of the rotational resistance in the Ku-Etta multicylinder system rotating in the direction towards each other is measured. The experiments were carried out for three values of the kinematic viscosity of the working fluid that fills the multicylinder system: water at a temperature of 24 °C (viscosity 0.9 cSt), an aqueous solution of glycerol at 20 ° C and 41 °C (2.5 cSt and 5.2 cSt). An attempt is made to investigate the features of a viscous flow in the multicolor Couette flow system from the analysis of the energy spectra of the moment of resistance to rotation of cylinders.

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Experimental investigation of thermal processes in the multi-ring Couette system with counter rotation of cylinders

Cited by 8 publications

References 3 publications

Flow regimes in a multi-gap circular Couette-Taylor system with opposite rotating cylinders

Flow regimes in a multi-gap circular Couette-Taylor system with opposite rotating cylinders

Resistance force pulsations of annular flow in the Couette-Taylor system with counter-rotating cylinders

Experimental investigation of rotation resistance moment energy spectra in multicylindrical circular Couette system with independently rotating cylinders

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