https://www.elibrary.ru/title_about_new.asp?i 2782-6724 Global Energy 2 243 2016
RAR RUS 7-15 Barilovich Vladimir Smirnov Yurii y_a_s@mail.ru STEAM-EJECTING INJECTOR:  СALCULATION AND APPLICATION IN HEATING SYSTEMS On the basis of the system of one-dimensional stationary differential equations of conservation laws а calculation of the injector working at water vapor is executed. The main parts of the injector are considered: an accelerating Laval nozzle, a mixing camera and a diffuser with a cylindrical entrance. Calculation allows determining the characteristic sizes of a design of the injector and change of the key physical parameters of water and steam by its length. The calculation results are compared to author’s own experimental data. The scheme with an injector for heating of network water is suggested and compared to existing ones. The injector usage instead of ordinary water heater with a pump leads to significant saving of fuel and electric energy. 10.5862/JEST.243.1 536.7 INJECTOR; NOZZLE; MIXTURE CAMERA; DIFFUSER; HEATER OF NETWORK WATER; PUMP; ECONOMY OF FUEL. https://engtech.spbstu.ru/article/2016.96.1/ 1_barilovich.pdf
RAR RUS 16-23 Grishin Nikolai kostroma44@gmail.com EQUATIONS FOR OPERATION CONDITIONS PROBLEMS  OF SIX PHASE TURBINE GENERATORS OF MAXIMUM CAPACITY Polyphase stator winding can be used for increasing the unit capacity of high-power turbine generators. This includes six-phase winding consisting of two separate three-phase windings displaced by 30 electrical degrees. The modern high-power six-phase turbine generators are widely used in the construction of nuclear power plant units. Six-phase turbine generators have some specifics compared with three-phase generators due to mutual inductive coupling between three-phase stator winding systems. Some issues regarding six-phase generators have been described in literature; however, the operation conditions and related aspects have not been studied enough. This article has obtained differential equations defining the operation conditions of a six-phase turbine generator in phase coordinates using the common assumptions from the theory of three-phase machines. The relationship between self and mutual induction of rotor and stator circuits is defined. Leakage reactance of stator circuits is presented as a sum of leakage reactance for the self and mutual induction paths between three-phase stator winding systems. The equations were converted to rotating coordinates synchronous with rotor to provide higher clarity and reduce the amount of resources required for the calculations. We have explored the differences from the well-known equations for three-phase machines. The equation for the rotor movement of the six-phase generator has been determined. We have chosen the relative units allowing to simplify the obtained expressions and compare the parameters with those of ordinary three-phase generators. By this equations of six-phase generator operation are obtained. These relative units enables us to find the equations similar to the Park-Gorev-form equations for three-phase turbine generators. Solving these equations by traditional methods known for three-phase machines allow studying the operation modes and transient processes of six-phase turbine generators. 10.5862/JEST.243.2 621.313.322-81 TURBINE GENERATORS OF MAXIMUM CAPACITY; SIX-PHASE TURBINE GENERATORS; OPERATION CONDITIONS PROBLEMS; OPERATION CONDIONS EQUATIONS; LINEAR TRANSFORMATION. https://engtech.spbstu.ru/article/2016.96.2/ 2_grishin.pdf
RAR RUS 24-33 Anikina Irina ia.88@mail.r u AAU-2845-2020 56042381200 0000-0002-6289-325X Peter the Great St. Petersburg Polytechnic University, Russia Sergeev Vitaly vitaly.sergeev@spbstu.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
 Amosov Nikolay nwp_amossov@mail.ru Luchko Mariia Luchko.MG@tgc1.ru HEAT PUMPS IN SCHEMES  OF MAKE-UP WATER DEAERATION IN A THERMAL POWER PLANT The paper considers installing vapor compression heat pumps at thermal power stations with the purpose of increasing the electrical power generation efficiency. All calculations were made for the Pravobereznaya CHPP-5 thermal power station of the Nevsky branch of the TGC-1 JSC. The calculations were made for heat pumps with different heat capacities of 2 MW and 50 MW. The efficiency of the heat pump system within the heat grid of the power station was analyzed through a detailed calculated estimate of the effect on the operating mode of the station with simultaneous calculation of the heat pump characteristics. The analysis was performed for different operating modes of the station. We proposed a scheme for using the heat pump for heating the make-up water in the heat supply system before it enters the vacuum deaerator. The cooling water located after the condenser on the combined cycle power unit is recommended as a low-energy heat source. Different alternatives of using the heat from the heat pump have been analyzed and the results demonstrate that the schematic application of heat pumps with the heat capacity of 50 MW to increase the heat generation in the heat supply system is commercially viable. The reference fuel economy runs at 57.3 thousands of tons per year and the payback time will be less than 2 years. 10.5862/JEST.243.3 621.577.42 HEAT PUMP; CHP; EFFICIENCY; MAKE-UP WATER; MODES OF OPERATION. https://engtech.spbstu.ru/article/2016.96.3/ 3_anikina.pdf
RAR RUS 34-44 Kozin Evgenii nz1@metro.spb.ru Kozhukhov Iurii kozhukhov_yv@mail.ru TECHNOLOGICAL AUDIT OF A PNEUMATIC SYSTEM  AS A STAGE IN ITS RECONSTRUCTION PROCESS The article describes a technique for assessing a centralized pneumatic system with consumers with various levels of requirements to compressed air regarding pressure and class of cleaning, and presents the results of this assessment. The object of study is the working pneumatic system for the technical needs of the consumers of the platform of the Nevskoye depot of St Petersburg Metro SUE. The experimental characteristics of the object have been inspected under different modes of operation; the shortcomings of the existing pneumatic system are described. A schematic diagram of a potential power-effective pneumatic system is designed through multiple parameter analysis, and taken as a basis for the modernization project currently under development. The designed scheme provides requirements for the technological process and the increase in the reliability of the pneumatic system. The results of the study can be used for modernization, operation, repair and service of pneumatic depot systems. 10.5862/JEST.243.4 62.133.54: 62.986: 66.5 PNEUMATIC AUDIT; PNEUMATIC SYSTEM; COMPRESSOR; DEPOT SUBWAY; COMPRESSED AIR; INCREASE OF EFFICIENCY. https://engtech.spbstu.ru/article/2016.96.4/ 4_kozin.pdf
RAR RUS 45-52 Grigorieva Olga Grigorieva.00@mail.ru Krivenko Tatiana tanya-1991mir@mail.ru Tremyasov Vladimir emf_tva@mail.ru RELIABILITY ANALYSIS OF AN AUTONOMOUS WIND-DIESEL COMPLEX Using wind-diesel complexes in autonomous electricity supply systems allows to substitute the expensive part of diesel fuel by renewable energy sources. The renewable energy sources, however, are unstable energy sources whose behavior differs much from the conventional ones. They rely in their functioning on nature resources, which affects the stable operation of the electric supply system. Therefore, analyzing the reliability of generation systems based on renewable energy sources is of immediate interest. The logical and probabilistic method has been suggested for evaluating the reliability of an autonomous wind-diesel complex considering the specifics and conditions of its functioning. The reliability of a wind-diesel complex located at the north of the Krasnoyarsk Krai is computed. 10.5862/JEST.243.5 621.311.245 RENEWABLE ENERGY SOURCE; WIND-DIESEL COMPLEX; RELIABILITY; FAULT TREE; FAILURE; RELIABILITY INDICATORS. https://engtech.spbstu.ru/article/2016.96.5/ 5_grigoreva.pdf
RAR RUS 53-61 Murashov Iurii iuriimurashov@gmail.com SIMULATING THE VORTEX STABILIZATION OF AN ARC PLASMA TORCH The article is dedicated to numerically simulating the formation of vortex stabilization of an electric arc and to analyzing the gas flow behavior. The three-dimensional model of transient laminar flow is designed for the actual geometry of the plasma torch. Reynolds numbers are presented for varying values of gas flow consumption. The formation time of a steady flow is determined by creating an automatic start algorithm of the plasma torch. The three-dimensional model allows to obtain the distribution of velocities needed for setting the boundary conditions of a two-dimensional axisymmetric task. The general goal of the study is creating a mathematical model of a plasma torch with vortex stabilization of the electric arc. 10.5862/JEST.243.6 533.951.8 PLASMA TORCH; VORTEX STABILIZATION; SIMULATION; LAMINAR FLOW; TURBULENT FLOW. https://engtech.spbstu.ru/article/2016.96.6/ 6_murashov.pdf
RAR RUS 62-71 Grishin Nikolai kostroma44@gmail.com EQUIVALENT CIRCUITS FOR OPERATION CONDITIONS PROBLEMS OF SIX PHASE TURBINE GENERATORS OF MAXIMUM CAPACITY Six-phase turbine generators are commonly used in the modern Russian power industry when constructing power-generating units of more than 1000 MW. Issues of operation conditions of a six-phase turbine generator could be studied by analogy with three-phase machines based on equations of state for two mutually perpendicular axes of the Park-Gorev type written for an idealized machine. The investigation is simplified if the real machine whose rotor and stator windings are electromagnetically coupled is replaced by equivalent circuits with only electrical coupling between its components. Equivalent circuits could be created by representing the variables in vector form and investigating the steady-state, transient and sub-transient conditions. These circuits have a common structure and differ only by their parameters. In this case, a broad range of steady-state and transient problems could be studied, including those with different loads of three-phase systems. In addition, equivalent circuits could be used for studying the operation conditions of power-generating units, the operation problems of energy systems, and so on. The conditions of steady short circuits of a turbine generator are considered as an example. The obtained results correspond with the experimental values found from serial production tests. 10.5862/JEST.243.7 621.313.322-81 TURBINE GENERATORS OF MAXIMUM CAPACITY; SIX-PHASE TYRBOGENERATORS; CONDITIONS PROBLEMS; OPERATION CONDITIONS EQUATIONS; EQUIVALENT CIRCUITS. https://engtech.spbstu.ru/article/2016.96.7/ 7_grishin.pdf
RAR RUS 72-79 6506540671 Peter the Great St. Petersburg Polytechnic University, Russia Zaboin Valeriy zabv@rambler.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
 Chesnokov Grigorii G.A.Chesnokov@gmail.com ASSESSING THE ACCURACY OF ANALYTICAL METHODS  FOR CALCULATING THE NO-LOAD LOSS COMPONENTS  IN INDUCTION MOTORS This article discusses the methods for reducing the idling losses in high-power induction motors as an opportunity for increasing their efficiency to meet the requirements of modern standards and customers. We have performed a comparative analysis of the tested no-load losses of three induction motors with the calculation results separated into stator copper losses, steel losses and stray losses by two different analytical approaches. Steel losses are supposed to consist of main steel losses and stray pulsation steel losses. Stray losses in a copper rotor cage, caused by stator’s slot frequency currents due to the slotted structure of the stator, are examined separately. The existing approaches to calculating no-load loss components have been proved to be insufficiently accurate for making reasonable engineering decisions aimed at decreasing no-load losses. 10.5862/JEST.243.8 621.313.333.2 INDUCTION MOTOR; NO LOAD LOSS; STEEL LOSS; STRAY LOSS; EFFICIENCY. https://engtech.spbstu.ru/article/2016.96.8/ 8_chesnokov.pdf
RAR RUS 80-87 Plotnikov Andrey andreyplotnikow@gmail.com Emelyanov Oleg oaemel2@gmail.com NONLINEAR CERAMIC CAPACITORS IN CHARGING-DISCHARGING MODES: EXPERIMENTAL STUDY AND ANALYTICAL CALCULATIONS The goal of the paper is in studying modern high-energy density multilayer ceramic capacitors (MLCCs) with nonlinear dielectrics such as X7R, Y5V, Z5U. The charging-discharging modes of MLCCs as well as the frequency spectra of dielectric characteristics such as admittance and equivalent series resistance (ESR) have been investigated. We have proposed an approach to estimating the dielectric loss in pulsed modes based on ESR frequency spectrum averaging. The capacitance dependencies on DC bias voltage have been obtained. A mathematical model for analytical calculation of the circuit electrical parameters is proposed. The model takes into account the capacitance dependence on applied voltage. The adequacy of the model is confirmed by the numerical calculations and experimental studies results. 10.5862/JEST.243.9 537.226.4: 621.319.1 FERROELECTRIC; CERAMIC CAPACITOR; NONLINEAR; PULSED MODE; ANALYTICAL SOLUTION. https://engtech.spbstu.ru/article/2016.96.9/ 9_plotnikov.pdf
RAR RUS 88-98 Sokolova Olga sokolova@econ.asu.ru COMPARING THE EFFECTIVENESS OF SECURITY CONTROL METHODS DURING GEOMAGNETIC DISTURBANCES  IN POWER SYSTEM OF RUSSIA AND IN EUROPE The quality standards for power supply are nearly the same in ENTSO-e and UPS of Russia, but the control principles are different. The differences are basically originating from the architecture of the power grids. The European grid mainly consists of short transmission lines. The UPS of Russia is characterized by the prevalence of long and weak interconnections. The project concerning the possibility of integrating ENTSO-e and UPS of Russia started more than 10 years ago. Such integration requires using the same or nearly the same control principles. Geomagnetic disturbances are the so-called high-impact low-frequency events. They affect large geographic areas and provoke simultaneous outage of several network elements. The strengths and weaknesses of the control methods employed by ENTSO-E and UPS of Russia for ensuring stability during geomagnetic disturbances have been analyzed in the article. 10.5862/JEST.243.10 621.311 POWER SYSTEM; SECURITY; CONTROL; GEOMAGNETIC DISTURBANCE; CONTROL ACTIONS; OPERATION LIMITS. https://engtech.spbstu.ru/article/2016.96.10/ 10_sokolova.pdf
RAR RUS 99-113 Anastasiadi Grigory A-9655-2014 7007045735 0000-0001-7385-147X Peter the Great St. Petersburg Polytechnic University, Russia Kondrat'ev Sergey petroprom2013@yandex.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
 Silnikov Mikhail director@mes.spbstu.ru THE ROLE OF THERMO-KINETIC DIAGRAMS OF THE DECOMPOSITION OF OVERCOOLED AUSTENITE FOR THE DESIGN OF STRUCTURAL STEELS The role and the relevance of creating diagrams of isothermal and thermo-kinetic transformation of supercooled austenite during the design of technological regimes of steel heat treatment have been investigated. It is shown that the studies of institutes and industrial enterprises of the Northwestern region of the country are of great importance for metallurgy. We have proved the need for a thorough examination of the transformation of supercooled austenite, and also systematized and generalized experimental data on the diagrams almost for all groups of steels and titanium alloys. Specific examples of the necessity of thermo-kinetic steel transformation diagrams for critical production tasks are given. 10.5862/JEST.243.11 669.017:669.017.3:620.18:621.78 STEELS AND ALLOYS; DIAGRAMS OF ISOTHERMAL AND THERMO-KINETIC TRANSFORMATION OF OVERCOOLED AUSTENITE; HEAT TREATMENT; MICROSTRUCTURE; PHASE COMPOSITION; MECHANICAL PROPERTIES. https://engtech.spbstu.ru/article/2016.96.11/ 11_anastasiadi.pdf
SCO RUS 114-123 Galevsky Gennadiy kafcmet@mail.ru Anikin Aleksandr Rudneva Victoria Galevsky Sergeii nirs@spmi.ru USING BROWN-COAL SEMI-COKE IN METALLURGY: TECHNOLOGICAL AND ECONOMIC ASSESSMENT We have analyzed the state of production, the properties and the areas of application of semi-coke from domestic low-metamorphism coals of various fields. We have compared the properties (ash-content, content of the fixed carbon, volatile content per on dry ash-free basis, reactivity, specific resistance, chemical composition of ashes, etc.) of brown-coal semi-coke from the Berezovsky deposit of the Kansk-Achinsk basin (KAB), the Talovsky deposit of the Tomsk region, of bituminous brand G coal of Kuzbass, and of DG brand coal of the Cheremkhovsky field of the Irkutsk basin. It is established that production and consumption of brown-coal semi-coke of the Berezovsky deposit of KAB is the most effective in view of its higher properties in comparison with semi-coke from low-metamorphism coals of other fields, a technological capability for large-capacity production, rather low cost, and also considerable need for the coal in many areas of the industry. 10.5862/JEST.243.12 662.732 SEMI-COKE; BROWN COALS; THE KANSK AND ACHINSK POOL; THE BEREZOVSKY FIELD; PRODUCTION; TECHNOLOGICAL PROPERTIES; APPLICATION IN METALLURGY. https://engtech.spbstu.ru/article/2016.96.12/ 12_galevskiy.pdf
RAR RUS 124-133 56035034600 Peter the Great St. Petersburg Polytechnic University, Russia Tsemenko Valeriy plast-ftim@mail.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
 Fuk Doan fukdoan@mail.ru Ganin Sergey DETERMINING THE RHEOLOGICAL CHARACTERISTICS AND MODELING THE EXTRUSION OF POWDER AND POROUS MATERIALS. PART 1. POWDER BODY The paper has studied the process of plastic deformation of powder metal materials via various numerical methods, in particular, the finite-element method. The calculation and experimental technique developed for determining the rheological characteristics of powder materials is performed according to the well-known mechanical characteristics of the material’s particles on the basis of analyzing the deformation of an idealized model of a powder body. We have considered an idealized model of the powder body, based on which we simulated the deformation process of an elementary cell shaped as a cube with a spherical particle surrounded with a faceted pore. The simulation results are in good agreement with the experimental data on the pressing of the AKB-2.5 powder material in a closed matrix. This means it is possible to use the developed calculation and experimental technique for determining the rheological characteristics of a powder body from the known yield point values of the particle material for simulating the consolidation processes of powder materials. 10.5862/JEST.243.13 621.762 POWDER METALLURGY; COMPACTION; MATHEMATICAL MODELLING; PLASTIC DEFORMATION; DENSITY. https://engtech.spbstu.ru/article/2016.96.13/ 13_tsemenko.pdf
RAR RUS 134-133 56035034600 Peter the Great St. Petersburg Polytechnic University, Russia Tsemenko Valeriy plast-ftim@mail.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
 Fuk Doan fukdoan@mail.ru Ganin Sergey DETERMINING THE RHEOLOGICAL CHARACTERISTICS AND MODELING THE EXTRUSION OF POWDER AND POROUS MATERIALS.  PART 2. POROUS BODY The paper investigates the plastic deformation processes in metal materials using the numerical methods, in particular, the finite-element method. The calculation and experimental technique developed for determining the rheological characteristics of a porous material is performed according to the well-known mechanical characteristics of the material’s particles on the basis of analyzing the deformation of an idealized model of a porous body. We have considered an idealized model of the porous body, based on which we simulated the deformation process of a representative elementary cell shaped as 1/8th of a cube with a spherical pore. The simulation results are in good agreement with the experimental data on the pressing of the AKB-2.5 porous material. This means it is possible to use the developed calculation and experimental technique for determining the rheological characteristics of a porous body from the known yield point values of the particle material for simulating the consolidation processes of porous materials. 10.5862/JEST.243.14 621.762 POWDER METALLURGY; COMPACTION; MATHEMATICAL MODELLING; PLASTIC DEFORMATION; DENSITY. https://engtech.spbstu.ru/article/2016.96.14/ 14_tsemenko.pdf
RAR RUS 144-152 Petrovich Sergey lmpa2010@mail.ru Andreeva Valentina avd2007@bk.ru Lipin Vadim vadim.lipin@km.ru Karakchiev Sergei serkarakchiev93@gmail.com Boricheva Irina iboricheva@ftim.spbstu.ru QUALITATIVE AND QUANTITATIVE INDICATORS  OF RAPIDLY SOLIDIFIED ALLOYS OF THE AL-ZN-MG-CU SYSTEM MODIFIED BY ZIRCONIUM Samples of a rapidly solidified Al-Zn-Mg-Cu alloy modified by zirconium were obtained. An amorphous layer which did not exceed 9% of the total volume of the sample was discovered on the sample surface that was in direct contact with the cool ambient. This layer is a compound material consisting of an amorphous matrix and inclusions of intermetallic Zr3Al, Zr2Al, ZrAl2 and ZrAl3 compounds, wherein ZrAl3 is the strengthening phase with particle sizes ranging from 5 to 30 nm. Amorphization of the whole volume of the alloy with added zirconium as an alloying component allows to obtain an almost uniform distribution of intermetallics in the amorphous matrix. The total number of Al-Zr intermetallics decreases with an increase in zirconium content above 1.5 wt%. When this happens, a significant growth of Al grain can be observed, which is evidence of the further increase in the content of zirconium as the alloying component. 10.5862/JEST.243.15 621.762 ALUMINIUM ALLOY; ULTRA-RAPID SOLIDIFICATION; AMORPHOUS MATRIX; ZIRCONIUM MODIFYING; ZINC; MAGNESIUM; CUPRUM; INTERMETALLIC. https://engtech.spbstu.ru/article/2016.96.15/ 15_petrovich.pdf
RAR RUS 153-162 Mamutov Viacheslav vmamutov@mail.ru Mamutov Alexander Kuriatnikov Аleksandr kuriatnikov91@mail.ru COMPUTER SIMULATION OF AN ELECTOHYDRAULIC SHEET METAL PRESSING IN VIEW OF THE CAVITATION TRESHOLD The presence of cavitation effects during electrohydraulic pressing is shown. The effect of cavitation on the pressure in the discharge chamber and at the blank surface is estimated using a numerical model of the axisymmetric discharge chamber developed using the LS-DYNA 971 finite element complex. The energy deposition law in a plasma channel is defined by the experimentally obtained curve. The water is defined as an ideally compressed liquid. The blank is built using one-dimensional elements with axi-symmetrical shell formulation. The calculations performed for negative cavitation thresholds of 0.1 MPa and 40 MPa have shown the negligible difference in the blank’s deformation despite the fact that pulse pressure at the blank’s surface changes significantly. 10.5862/JEST.243.16 621.983.044+532 ELECTROHYDRAULIC FORMING; CAVITATION IN WATER; COMPUTER SIMULATION USING LS-DYNA 971; ENERGY DEPOSITION LAW; IDEALLY COMPRESSED LIQUID; AXI-SYMMETRICAL SHELL; CAVITATION THRESHOLD; NUMERICAL MODEL OF THE AXISYMMETRIC DISCHARGE CHAMBER; NEGLIGIBLE DIFFER. https://engtech.spbstu.ru/article/2016.96.16/ 16_mamutov.pdf
RAR RUS 163-173 Nguyen An anquang12a1@mail.ru Lapshin Kirill kirill.lapschin@gmail.com CHARACTERISTICS AND STRUCTURE OF THE FLOW IN A TURBINE STAGE WITH A NEGATIVE GRADIENT OF THE DEGREE OF REACTIVITY The characteristics and the structure of the spatial flow in an axial turbine stage with a negative gradient of the degree of reactivity were explored. A calculation model of the stage was constructed and 3-D testing gas-dynamic calculations in ANSYS CFX were performed. The structure of the flow between blade rows and in the blade–to–blade sections on different sections along the radius were analyzed under nominal conditions. The graphs of the efficiency index and the degree of reactivity depending on the frequency of the rotor are presented. The distribution of flow parameters (α1, β1 and α2 angles; the degree of reactivity, coefficients of flow velocity for the guide vanes and the impellers) are given by the height of the blade. The calculation results are compared with the experimental data. We have concluded that it seems feasible to use ANSYS CFX to determine the characteristics and spatial patterns of flow in the turbine stage with the negative gradient of the degree of reactivity. The merits of this type of stage compared to the stage of conventional type are formulated. 10.5862/JEST.243.17 621.438.001.2 TURBINE STAGE; TANGENTIAL INCLINATION; GUIDE BLADES; NEGATIVE GRADIENT OF DEGREE OF REACTIVITY; ANSYS CFX. https://engtech.spbstu.ru/article/2016.96.17/ 17_nguen.pdf
RAR RUS 174-180 Latuhina Anastasiia lai-03@mail.ru Loktionova Elena elena.lokt@yandex.ru Polupanova Juliia julypolup@mail.com HYDRODYNAMICAL GRID RESISTENCE IN PRESSURE CONDUITS The practical application of grids and lattices is extremely wide. However, their use results in additional resistance and energy losses in the flow. Selecting the type and mesh design is determined by its purpose and conditions of use. The article investigates a perforated plastic grid with varying degrees of permeability at the outlet of the conduit. We have experimentally determined the effect of mesh on the flow rates of the pressure pipe. Flow coefficient values were set in two ways: with constant and variable pressure. It is shown that the two methods for determining the rate coefficients are identical. We have calculated the drag coefficients of the grid. The influence of grid porosity on the numerical values of these coefficients has been studied. The calculated values are approximated by the degree of the dependence linking the drag coefficients to surface grids and linear porosity. The proposed dependencies have been compared with the data presented in the literature. The recommendations for setting the values of drag coefficients of the devices are given. 10.5862/JEST.243.18 532.5: 621.6 PERFORATED GRIDS; FLOW COEFFICIENT; DRAG COEFFICIENT; SURFACE POROSITY; LINEAR POROSITY. https://engtech.spbstu.ru/article/2016.96.18/ 18_latukhtina.pdf
REV RUS 181-200 Ivanov Alexander ivanov@mediabooks.ru ACADEMIC PUBLISHING  IN THE POLYTECHNIC UNIVERSITY The Information Age in which we live has not come at once, had its own premises. In addition, in fact, to scientific thought and selfless work of tens of thousands of scientists in the world, it served as the foundation for the ability to generate knowledge in a printed book. This important process, along with the emergence of writing, began with the invention of Gutenberg’s printing press in 1445. Also this process had its historical retrospectives that passed its way into every area of publishing. Saint Petersburg is a scientific and educational center of the country. Here scientific publishing has its own way, which had a significant impact on the publishing of contemporary Russia. Unwittingly Politechnical University began the leader in the university book publishing in the beginning of the 21st century. Technological and economic concepts developed within its walls, were taken as a basis and are still used by the country’s universities. 10.5862/JEST.243.19 655 PUBLISHING HOUSE; POLITECHNICAL UNIVERSITY; UNIVERSITY BOOK PUBLISHING; DIGITAL PRINTING HOUSE; PRINTING MACHINES; MANAGEMENT IN THE PUBLISHING BUSINESS; SCIENCE; EDUCATIONAL PROCESS; EDUCATIONAL LITERATURE; PRINTING BUSINESS. https://engtech.spbstu.ru/article/2016.96.19/ 19_ivanov.pdf
REV RUS 201-207 Frolov Vladimir Ivanov Ivan eie@spbstu.ru THE FIRST RUSSIAN PROFESSOR OF ELECTRICAL ENGINEERING (DEDICATED TO THE 150TH ANNIVERSARY  OF THE BIRTH OF MIKHAIL A. CHATELAIN) The essay is dedicated to the life, teaching and research activities of Mikhail A. Chatelain, a prominent electrical engineering scholar and proponent of higher education in electrical engineering in Russia, corresponding member of the Academy of Sciences of the USSR, Hero of Socialist Labor, who was one of the founders of the Polytechnic Institute. 10.5862/JEST.243.20 621.3 M. CHATELAIN; ELECTRICAL ENGINEERING; GOELRO PLAN; CORRESPONDING MEMBER OF THE USSR ACADEMY OF SCIENCES; HERO OF SOCIALIST LABOR. https://engtech.spbstu.ru/article/2016.96.20/ 20_frolov.pdf
REV RUS 208-213 Morachevski Andrey morachevski@mail.ru ACADEMICIAN NIKOLAI SEMYONOV  (ON THE 120TH ANNIVERSARY OF HIS BIRTH) The essay is dedicated to the life and scientific and pedagogical activity of outstanding scientist in the field of chemical physics, a member of the Academy of Sciences of the USSR and of many academies of other countries, Nobel Prize in Chemistry in 1956 Nikolay Nikolaevich Semenov, a long time taught at the Petrograd (Leningrad) Polytechnic Institute. 10.5862/JEST.243.21 001:929:66 N.N. SEMENOV; NOBEL LAUREATE; FULL MEMBER OF THE USSR ACADEMY OF SCIENCES; CHEMISTRY; PHYSICS; POLYTECHNICAL INSTITUTE. https://engtech.spbstu.ru/article/2016.96.21/ 21_morachevskiy.pdf
REV RUS 214-218 Shaplygin Nikolai interserv@stu.neva.ru ACADEMICIAN BORIS GALERKIN (DEDICATED TO THE 145TH ANNIVERSARY OF HIS BIRTH) The article is dedicated to Boris Grigorievich Galerkin, one of the greatest engineers of the first half of the 20th century, academician of the Academy of Sciences of the USSR, who in 1899 graduated from the mechanical department of the St. Petersburg Technological Institute of Emperor Nicholas I. He started his career as a scientist at the Polytechnic Institute, among such mechanics scholars as V.L. Kearney-Chev, I.V. Meshchersky, S.P. Tymoshenko, A.P. Van der Fleet. He founded the Institute of Mechanics of the Academy of Sciences of the USSR in the last years of his life. He won the Stalin Prize in 1942. 10.5862/JEST.243.22 001:929 MECHANICS SCHOLAR; TECHNOLOGICAL INSTITUTE SCHOLAR; BASIC SCIENTIFIC WORK; ANALYSIS OF STRUCTURES; LECTURER; PROFESSORS OF POLYTECHNIC INSTITUTE; ACADEMY OF SCIENCES OF THE USSR. https://engtech.spbstu.ru/article/2016.96.22/ 22_shaplygin.pdf