Industrial processes and technologies en-US (Журнал "Промышленные процессы и технологии") (Журнал "Промышленные процессы и технологии") Mon, 31 Oct 2022 01:29:26 +0300 OJS 60 An extension of the all-Mach number pressure-based solution framework for numerical modelling of two-phase flows with interface <p>In this paper, we present the extension of the pressure-based solver designed for the simulation of compressible and/or incompressible two-phase flows of viscous fluids. The core of the numerical scheme is based on the hybrid Kurganov — Noele — Petrova/PIMPLE algorithm. The governing equations are discretized in the conservative form and solved for velocity and pressure, with the density evaluated by an equation of state. The acoustic-conservative interface discretization technique helps to prevent the unphysical instabilities on the interface. The solver was validated on various cases in wide range of Mach number, both for single-phase and two-phase flows. The numerical algorithm was implemented on the basis of the well-known open-source Computational Fluid Dynamics library OpenFOAM in the solver called interTwoPhaseCentralFoam.</p> <p>The source code and the pack of test cases are available on GitHub: <a href=""></a></p> <p>The research was supported by Russian Science Foundation (proj. 17-79-20445).</p> Matvey V. Kraposhin, A. V. Kukharskii, V. N. Korchagova, A. A. Shevelev Copyright (c) 2022 Industrial processes and technologies Mon, 31 Oct 2022 00:00:00 +0300 Promising schemes of reactor units of hydrotreating plants <p>The article discusses the disadvantages of industrial diesel hydrotreating plants. The analysis of the relationship between the composition of purified diesel fuel by organosulfur mixtures and the kinetics of the chemical process with a complex of reacting substances of various reactivity is carried out. It is shown that the whole variety of schemes of industrial reactor units operating under other equal conditions is equivalent in kinetics and the need for a catalyst to a single reactor. It has been shown that with preliminary fractionation of the feedstock with subsequent separate hydrotreating of the obtained fractions, it can significantly reduce the cost of the catalyst. It is shown by calculations that there are such temperature limits of boiling points of hydrogenated fractions at which the volume of loaded catalyst is minimized for two- and three-reactor schemes of hydrotreating process.</p> Naum Samoilov Copyright (c) 2022 Industrial processes and technologies Mon, 31 Oct 2022 00:00:00 +0300 Application of pulsed electric field for intensification of extraction processes <div class="page" title="Page 6"> <div class="layoutArea"> <div class="column"> <p>An important indicator of the quality of medicines is the absence of metal impurities in them. The main source of metal impurities getting into finished dosage forms is the erosion of metal parts of equipment, mainly in the process of grinding plant materials, as well as at other stages of the technological process for obtaining medicines. Therefore, the development of a science-based extraction technology that simultaneously solves environmental problems and reduces the likelihood of metal impurities in the target product is of current scientific and practical importance.</p> <p>An electric pulsed field with a strength of about 106 V/m, used to intensify the water ex- traction process, does not affect the qualitative composition and quantitative content of the extracted biologically active substances. Determination of the content of metal impurities in the extract was carried out according to the method of the State Pharmacopoeia.</p> <p>It is shown that no metal impurities are detected in the analyzed extracts obtained by extracting raw materials using a high-intensity pulsed electric field.</p> </div> </div> </div> V. T. Kazub, A. G. Koshkarova Copyright (c) 2022 Industrial processes and technologies Mon, 31 Oct 2022 00:00:00 +0300 Determination of correlation dependences of antistatic indicators of materials for the production of footwear for special purposes <div class="page" title="Page 8"> <div class="layoutArea"> <div class="column"> <p>The buildup of electrostatic charges on materials is a big problem in many industries, particularly in situations where "uncontrolled" charges are present near flammable materials and liquids. But the risks of ignition due to the accumulation of electrostatic charges, as well as the sources of fires and explosions, can be controlled if the problem of electrostatic protection of the entire production process is properly approached. One of the elements of protecting a person from electrostatic charges during production processes is antistatic shoes. At the same time, the properties of antistatic shoes directly depend on the materials from which they are made. Therefore, it is necessary to study the antistatic properties of materials for the design of antistatic footwear structures. In this paper, the indicators of the electrostatic field strength (ESF) and the surface electrical resistance of materials for the uppers of shoes are considered and a correlation between them is established to predict the electro- static properties of shoe materials depending on their composition.</p> </div> </div> </div> O. A. Belitskaya, V. V. Kostyleva Copyright (c) 2022 Industrial processes and technologies Mon, 31 Oct 2022 00:00:00 +0300 Catalysts for the synthesis of hydroxylamine sulfate by hydrogenation of nitric oxide (II) with hydrogen in sulfuric acid <p>The stages of synthesis and regeneration of the Pt/C catalyst used in the production of hydroxylamine sulfate by hydrogenation with NO in an aqueous solution of sulfuric acid are analyzed. The role of the surface of the carbon support in the activity and selectivity of the catalyst is evaluated. Pt/C regeneration is described in detail. Examples of the use of complexing agents to reduce the proportion of processes that poison the catalyst are given. A new Pt/C catalyst based on a carbon fabric on which nanodispersed platinum particles obtained by the electro-condensation method in an organic liquid phase are deposited by a transfer method is proposed. The preparation of this catalyst using the Langmuir–Blotgett technology is described.</p> A. V. Artemov, M. V. Dubanov, S. V. Ardamakov Copyright (c) 2022 Industrial processes and technologies Mon, 31 Oct 2022 00:00:00 +0300 All-Russian Competitions "Engineer of the Year" and "Hope of Russia" in 2022 <p>Under the leadership of the President of the Russian Union of Scientific and Engineering Public Associations, member of the Presidium of the Russian Academy of Sciences, Academician of the Russian Academy of Sciences Yu. V. Gulyaev, RosSNIO annually, since 2008, has been holding a competition for the youth award in the field of science and technology "Hope of Russia" in order to promote the innovative development of the country's economy, educate and support young creatively gifted and creatively thinking scientific and engineering personnel. By Decree of the Government of the Russian Federation of August 5, 2010 No. 602, the youth award of RosSNIO "Hope of Russia" in the field of science and technology is included in the list of the most prestigious awards for outstanding achievements in the field of science and technology, education, culture, literature, art and mass media recognized in our state. The award is a monetary reward, a diploma and a commemorative medal of the laureate. The age of nominated persons must not exceed 35 years. Regulations on the Youth Prize of the Russian Union of Scientific and Engineering Public Associations "Hope of Russia" in the field of science and technology for 2022 are posted on the RosSNIO website <a href=""></a></p> S. P. Drukarenko Copyright (c) 2022 Industrial processes and technologies Mon, 31 Oct 2022 00:00:00 +0300 Improving the energy efficiency of the heat network <p>An efficiency analysis was carried out for the heat network, describing its dependence on the ambient temperature, the flow rate of the coolant, and the temperature graph. It is shown that the efficiency of heat transport can be increased using modern materials as thermal insulation, optimization of quantitative and qualitative regulation of coolant flow in pipelines and reduction of energy consumption by network pumps.</p> <p>A dimensionless complex is formulated, with the use of which two-dimensional criterion dependences for the efficiency indicator are found, which allow choosing the optimal parameters of the heat network. A graphical method is proposed for finding the optimal coolant flow rate based on the standard efficiency values; which made it possible to reasonably choose the diameters of network pipelines and link their values with the permissible pressure loss.</p> <p>The functional dependences of the consumption characteristics according to the method of quantitative regulation are given. For thermal networks, they can be used for computer modeling and optimization of their parameters, including optimization of electrical and thermal losses arising in pumps installed in the network.</p> L. I. Zhmakin, N. M. Sharpar, E. O. Polutsygan Copyright (c) 2022 Industrial processes and technologies Mon, 31 Oct 2022 00:00:00 +0300 Thermal resistance of the contact connection of birch wood and the heating element <p>The results of an experimental study of the thermal and mechanical contact of the elements of a compound made of dissimilar materials - freshly cut hardwood (birch) and a plate made of alloy D16T are presented. The experiment was carried out on a special installation that allows using thermocouples to obtain a temperature profile in contact pairs in a steady-state heat transfer process. The contact pair is subjected to compressive forces, while the pressure range at the outer boundary of the contact pair is from 0.1 to 1.5 MPa. The results of the study revealed a tendency to decrease with increasing pressure in the contact zone of the magnitude of the temperature jump. At the same time, the value of the heat flux density increases. Experimental data are approximated by analytical dependencies. It is shown that increasing the pressure on the wood sample to 1.5 MPa leads to a decrease in the thermal resistance of the contact by more than 2 times. The experimental data can be used in engineering calculations of the operating parameters of the process of conductive drying and heating of birch lumber.</p> V. M. Popov, O. R. Dornyak Copyright (c) 2022 Industrial processes and technologies Mon, 31 Oct 2022 00:00:00 +0300 Technological techniques for equalizing of the temperature field in the room <p>A necessary requirement for a person's life and the fulfillment of his professional duties is to ensure a certain temperature regime in the room. This mode is provided by the heating system. Currently, the traditional method of heating both residential and industrial premises remains heating with radiators. In this case, the heat from the heat-emitting surface of the radiator is transferred to the ambient air in the room by heat transfer. As a result, the air temperature is unevenly distributed over the volume of the room. Moreover, what is especially significant, the warmer air, as lighter accumulates, at the top of the ceiling, and the colder, as heavier, sinks down to the floor. A person in this case is in unfavorable temperature conditions. Therefore, the search for solutions that allow a more evenly distributed temperature field over the volume of the room is an urgent task. The paper proposes a technical variant that allows solving this problem.</p> S. A. Tolstov, S. L. Panchenko Copyright (c) 2022 Industrial processes and technologies Mon, 31 Oct 2022 00:00:00 +0300