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Kiselev A.V.,University of Groningen | Krutov A.O.,Ivanovo State Power University
Journal of Physics: Conference Series | Year: 2014

We re-address the problem of construction of new infinite-dimensional completely integrable systems on the basis of known ones, and we reveal a working mechanism for such transitions. By splitting the problem's solution in two steps, we explain how the classical technique of Gardner's deformations facilitates-in a regular way-making the first, nontrivial move, in the course of which the drafts of new systems are created (often, of hydrodynamic type). The other step then amounts to higher differential order extensions of symbols in the intermediate hierarchies (e. g., by using the techniques of Dubrovin et al. [1, 2] and Ferapontov et al. [3, 4]).

Kiselev A.V.,University of Groningen | Krutov A.O.,Ivanovo State Power University
Journal of Nonlinear Mathematical Physics | Year: 2014

We associate Hamiltonian homological evolutionary vector fields - which are the non-Abelian variational Lie algebroids differentials - with Lie algebra-valued zero-curvature representations for partial differential equations. © 2014 Copyright: the authors.

Rebouillat S.,DuPont Company | Liksonov D.,Ivanovo State Power University
Computers and Fluids | Year: 2010

This paper describes recent studies devoted to the problem of modeling the solid-fluid interaction in partially filled liquid containers. This problem is of much importance for numerous applications, including those in the airspace industry (rockets, satellites), road and naval transportation, and has become in recent years an object of keen interest from researchers. The paper focuses in particular on the sloshing phenomenon and on the numerical approaches used to predict the sloshing wave amplitude, frequency, pressure exerted on the walls and the effect of sloshing on the stability in the container environment. Recent publications devoted to sloshing and fluid-structure interaction are reviewed and the numerical methods used in then are exposed and classified according to the problem formulations employed. They concern primarily finite-elements and finite-differences methods applied to Euler or Lagrangian fluid and solid domains, as well as the smoothed particle method. Issues related to modeling the free-surface of the fluid, fluid-solid interface and to numerical coupling are exposed. Results obtained by various numerical methods are discussed in comparison with experimental results, where possible. Applications of sloshing models in naval, aerospace and other industries are described and discussed. © 2010 Elsevier Ltd. All rights reserved.

Tyunina E.Yu.,Russian Academy of Sciences | Chekunova M.D.,Ivanovo State Power University
Journal of Molecular Liquids | Year: 2013

Electrical conductivities of LiAsF6 in methyl acetate were measured in concentration range of 0.4269-2.2672 mol·kg- 1 at 253.15, 263.15, 273.15, 283.15, 293.15, 303.15, 313.15, and 323.15 K. Data were treated by using the semi-empirical Casteel-Amis equation at high concentrations. The dependence of conductivities on the temperature was described by the Arrhenius relationship. It was shown that activation energies for conductivity linearly increased with the mole fraction of LiAsF6. The variation tendency of the energies of activation for the conductivities of LiAsF6 in the order of aprotic solvents (propylene carbonate, γ-butyrolactone, methyl acetate, tetrahydrofuran) has been discussed on the basis of the hypothesis that various conduction mechanisms occur at high concentration in the solvents of low permittivity. The anodic and cathodic stabilities of the LiAsF6 in methyl acetate were measured on a Pt electrode, a wide enough electrochemical stability window being observed. © 2013 Elsevier B.V. All rights reserved.

Aref'ev I.M.,Ivanovo State Power University | Lebedev A.V.,Russian Academy of Sciences
Colloid Journal | Year: 2016

Higher-order moments of particle size distribution functions are determined for magnetic fluids from analysis of initial segments of magnetization curves. It is shown that the higher-order moments calculated using approximation of real particle size distributions by the Γ distribution are strongly overestimated. Agreement between the measured and calculated moments can be radically improved by truncating maximum particle size Xmax. A relation between Xmax and the parameters of the Γ distribution is proposed taking into account the degree of polydispersity of a magnetic fluid. Namely, the ratio between the maximum and most probable particle diameters is equal to the ratio between the mean-square magnetic moment of a particle and its squared average magnetic moment. © 2016, Pleiades Publishing, Ltd.

Larin A.B.,Ivanovo State Power University | Larin B.M.,Ivanovo State Power University
Thermal Engineering | Year: 2016

The increased requirements to the quality of the water heat conductor for working superhigh (SHP) and supercritical (SCP) pressure power plants and promising units, including combined-cycle gas turbine (CCGT) units and power plants with ultrasupercritical parameters (USCPs), can largely be satisfied through specific electric conductivity and pH measurements for cooled heat conductor samples combined with calculations of ionic equilibria and indirect measurements of several specified and diagnostic parameters. The possibility of calculating the ammonia and chloride concentrations and the total concentration of hardness and sodium cations in the feed water of drum-type boilers and the phosphate and salt contents in boiler water was demonstrated. An equation for evaluating the content of potentially acid substances in the feed water of monotube boilers was suggested. The potential of the developed procedure for evaluating the state of waterchemistry conditions (WCCs) in power plants with CCGT units was shown. © 2016, Pleiades Publishing, Inc.

Glazunov V.F.,Ivanovo State Power University
Izvestiya Vysshikh Uchebnykh Zavedenii, Seriya Teknologiya Tekstil'noi Promyshlennosti | Year: 2014

The article features the principles construction of the system of asynchronous electric drive of mechanism warping and sealing of shafts, ensuring the formation of warning packages given density.

Glazunov V.F.,Ivanovo State Power University
Izvestiya Vysshikh Uchebnykh Zavedenii, Seriya Teknologiya Tekstil'noi Promyshlennosti | Year: 2014

The article considers static and dynamic models transported in deformation zones textile materials based on their viscoelastic properties, as well as analysis of their functions sensitivity to parameter variations.

Prorokova M.,Ivanovo State Power University | Bukhmirov V.,Ivanovo State Power University
MATEC Web of Conferences | Year: 2016

The article presents the details of modeling of heat exchange and mass transfer in a room in the formation of a microclimate. The mathematical model is implemented in the program ANSYS Fluent and is used to predict the climate parameters after the implementation of energy saving measures in the building. Verification of the mathematical model by comparing the experimental data with the results of the measurement of microclimate parameters of the experiment. © The Authors, published by EDP Sciences, 2016.

Mizonov V.,Ivanovo State Power University | Yelin N.,Ivanovo State Polytechnic University
International Journal of Thermal Sciences | Year: 2015

Abstract The objective of the study is developing a simple yet informative mathematical model that describes the kinetics of melting a rod under the action of a localized periodically moving heat source. For this purpose, a cell model is used with the heat conduction matrix that takes into account different properties of liquid and solid phases of the rod material. Zones of the rod that are outside of the local heat source action have heat exchange with the outside environment. It is shown that the melting kinetics strongly depends on the program of heat source motion along the rod and on its residence time at each of its positions. The optimal program of heat source motion that allows melting the whole rod over the shortest possible period of time is found. © 2015 Elsevier Masson SAS.

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