Andrey Mamykin

Russian Academy of Sciences | RAS · Institute of Continuous Media Mechanics

This paper studies a method of stirring liquid metal by the action of rotating magnetic fields using two ring inductors placed next to each other. These inductors generate magnetic fields rotating in opposite directions. The aim of this study is numerical investigation of the generated fluid flow and its impact on the homogenization of a two-phase...

A promising method for determining the flow rate of a liquid metal coolant is the temperature correlation method (TCM) since it does not require calibration. However, being indirect, it has a number of limitations to be carefully studied. A magnetic obstacle is used as a temperature pulsation generator. The paper presents the results of a numerical...

The paper presents a method for electromagnetic measurements of the chemical impurities’ con-centration in samples of non-ferrous metals. The principle of measurements is described and the in-fluence of the inaccuracy in geometric dimensions of the analyzed metal volume on the measure-ment error is established. The proposed measurement method was t...

We studied a numerical model describing electromagnetic forces that arise in a cylindrical volume of metal placed in the working area of a newly designed electromagnetic stirrer. The combined use of a complex-shaped inductor with a set of 6x6 coils and a power management system makes it possible to generate magnetic fields of almost any topology (i...

The study of the electromagnetic force acting on a medium with inhomogeneous electrical conductivity has been carried out. The electrical conductivity changes abruptly which simulates the liquid–solid interface during the crystallization of a pure metal. The electromagnetic force is created by a traveling field inductor with one of the most demande...

The influence of the cell inclination on the heat transport and large-scale circulation in liquid metal convection - Volume 884 - Lukas Zwirner, Ruslan Khalilov, Ilya Kolesnichenko, Andrey Mamykin, Sergei Mandrykin, Alexander Pavlinov, Alexander Shestakov, Andrei Teimurazov, Peter Frick, Olga Shishkina

The electromagnetic velocity sensor of Ricou and Vives with permanent magnet is well known. The probe is difficult to use at industrial conditions like metallurgy or nuclear power plants close to the Curie temperature. This article describes a reliable technique to provide controlled magnetic field distribution at the measurement area, generated by...

Inclined turbulent thermal convection by large Rayleigh numbers in extremely small-Prandtl-number fluids is studied based on results of both, measurements and high-resolution numerical simulations. The Prandtl number $Pr\approx0.0093$ considered in the experiments and the Large-Eddy Simulations (LES) and $Pr=0.0094$ considered in the Direct Numeric...

This paper focuses on an experimental study of the flow of an aqueous potassium alkali solution in a vertical plane layer subjected to electromagnetic force. Research is motivated by the need to investigate the problem of separation of weakly-conducting particles from highly conducting media. The electromagnetic force arises due to the interaction...

In agreement with a recent experimental study by Xi et. al. [1], we also observed the sloshing mode of the large scale circulation (LSC) in our experimental investigation of turbulent Rayleigh-Benard convection of liquid sodium in a cylindrical cell of aspect ratio one. The Rayleigh and Prandtl numbers vary within the range of (0.5 – 2.6)10⁷ and (8...

The effect of inclination on the low Prandtl number turbulent convection in a cylinder of unit aspect ratio was studied experimentally. The working fluid was sodium (Prandtl number Pr=0.0094), the measurements were performed for a fixed Rayleigh number Ra=(1.47±0.03)×107, and the inclination angle varied from β=0∘ (the Rayleigh–Bénard convection, t...

The experimental investigation of water solution of potassium alkali flow in vertical plane layer un-der influence of electromagnetic force have been occurred. The research is initiated by the problem of non-conductive particles separation. The generation of the force is occurred by interaction of electric current applied to solution and external d...

Рассматривается несколько МГД-устройств, работающих в жидкометаллическом натриевом контуре. Объединяющая особенность этих устройств –цилиндрический канал диаметром 68 мм, а также взаимодействие потока жидкого натрия с магнитными полями. Первым устройством является линейный цилиндрический МГД-насос для перекачивания жидкого натрия в контуре. Следующ...

The eddy current flowmeter for liquid metal passing through the cylindrical channel is studied experimentally and numerically. The alternating magnetic field is created by an annular-shape coil and resulting field is measured by two symmetric coils. The dependence of the signal on the magnetic field frequency was obtained for a solid duralumin cyli...

A convective flow of liquid sodium generated nearby a hot round in the upper solid end face of a vertical cylinder has been studied experimentally and numerically. A developed turbulent flow is observed in the upper part of the cylinder. Strong velocity pulsations penetrate in the bulk of the metal up to a distance of about the diameter of the cyli...

The paper present a liquid sodium flow measurement system developed and designed for the liquid sodium loop [1]. This system includes in fact three independent flowmeters combined in one single device. Two of these are based on electromagnetic (conduction and induction) methods, and one uses a thermocouple cross-correlation flow measurement method....

The paper present a liquid sodium flow measurement system developed and designed for the liquid sodium loop [1]. This system includes in fact three independent flowmeters combined in one single device. Two of these are based on electromagnetic (conduction and induction) methods, and one uses a thermocouple cross-correlation flow measurement method....

Turbulent convective heat transfer in a long closed cylindrical tube with L ≈ 20D (D = 96 mm is the diameter and L is the tube length) filled with liquid sodium, heated at one end face and cooled at the other, is studied experimentally for three different positions: vertical, inclined at 45 degrees to the vertical plane and horizontal. The Rayleigh...

The operation experience of sodium fast reactor shows that during design-basis validation of pipelines and equipment it is necessary to take into account the sodium free convection in the enclosures. The paper presents the results of experimental study of free convection of liquid sodium in a long thermo-insulated cylinder with the end heat supply...

Turbulent convective heat transfer in a closed cylinder with aspect ratio L = 5D (D is the diameter and L is the cylinder length) filled with liquid sodium, heated at one end face and cooled at the other, is studied experimentally for three different positions: vertical, inclined at 45 degrees to the vertical and horizontal. The Rayleigh number, wh...

Turbulent free convection of liquid sodium in a straight thermally insulated tube with a length equal to 20 diameters and with end heat exchangers ensuring a fixed temperature drop is investigated exper� imentally. The experiments are performed for a fixed Rayleigh number Ra = 2.4 × 10^6 and various angles of inclination of the tube relative to the...

Broadband electro-optic intensity modulators widely used in optical communication lines today. These modulators are used to transform the electrical high frequency signal to the optical signal. The most important characteristics of these devices are the electro-optical bandwidth, the modulation efficiency, the extinction on/off, the chirp, as well...