Moscow Power Engineering Institute Research Articles

Hydrodynamics and Heat Transfer in the Case of Combined Flow in a Annular Channel of Small Cross Section

The present work is a continuation of experimental investigations conducted at the Moscow Power Engineering Institute (MPEI) on heat-transfer intensification. Brief descriptions of the working section and structure of intensifiers are given and their basic geometric parameters are enumerated. New systematized experimental data on the coefficients of hydraulic resistance and heat transfer in the regime of single-phase convection are given in an extended range of regime parameters and geometric characteristics of the intensifiers. Considerable increase in the heat-transfer coefficient as a function of the geometric characteristics of the intensifier has been established experimentally. The values of the relative fin height, at which these are the maxima of heat transfer and hydraulic resistance, have been established. Calculated dependences for the coefficient of hydraulic resistance and heat transfer have been obtained.

Влияние температуры вдуваемого пара на характеристики жидкой фазы за изолированной сопловой решеткой

Erosion damage of the steam turbine flow path surfaces operating in the wet-steam region is presently a topical issue. Steam injection in locations containing the highest liquid film concentrations is considered to be one of promising ways to combat the adverse effect of erosion-hazardous coarse moisture droplets. The article presents the results from experimental studies aimed at determining the effect the steam injection temperature has on the characteristics of wet-steam flow liquid phase downstream of an isolated turbine blade cascade. A flat cascade of hollow nozzle vanes with a slit for steam injection located on the vane pressure surface near its trailing edge was used as the studied subject. The experiments were carried out on the experimental steam dynamics facility installed at the laboratory of the Moscow Power Engineering Institute National Research University's (MPEI) Department for Steam and Gas Turbines. Steam from extraction of the steam turbine installed at the MPEI's combined heat and power plant was used as the working fluid for the experimental facility. The experimental data were obtained for two initial moisture content values. The injected steam temperature was varied while keeping constant steam pressure in the injection chamber. The PIV method implemented in the POLIS laser diagnostic system was used for determining the effect of steam injection on the liquid phase characteristics. The average diameters of droplets downstream of the vane cascade were measured using the contactless technique developed at the MPEI Department for Steam and Gas Turbines. Angular misalignment between the phases was also analyzed, and the diameters of coarse droplets downstream of the vane trailing edge were estimated. An analysis of the obtained data has shown that steam injection affects the coarse droplet existence area downstream of the vane cascade. The coarse droplet slip coefficient is almost independent on the injected steam temperature, and the efficiency of the proposed technique is almost independent on the steam temperature upstream of the injection chamber.

Алгоритм термостабилизации силовых полупроводниковых приборов в электроприводе компрессора

A parametric approach for stabilizing the thermal state of power semiconductors in the converter for electrically driving the compressor used in subway trains is considered. Such an electric drive system is repeatedly switched in operation for a short period of time. The drive operates for approximately 5 min to fill the pneumatic system with compressed air, after which it is disconnected until the pressure in the system reduces due to compressed air consumption for braking the train or for opening and closing the doors. With such operation mode, semiconductors experience cyclic heating and cooling, due to which the problem of thermocycling is of significant importance for the power transistor modules used in such converter. Deviation of the crystal temperature above the transistor module substrate has a detrimental effect on the braze layer, causing it to become mechanically destructed and stratified, which eventually results in semiconductor failure. These features should be duly considered in selecting the power circuit configuration and in designing the converter. The compressor electric drive's power converter was designed at the Moscow Power Engineering Institute National Research University's Department of Automated Electric Drives. This converter comprises a step-down DC-to-DC converter producing a stable power supply voltage, a 3-phase inverter taking power supply from this voltage, and a du/dt filter. A thermal stabilization algorithm that has been implemented and tested at laboratory on a real power converter is proposed, the use of which makes it possible to reduce the temperature deviation of crystals in transistor modules. During the pause in the compressor duty cycle, the power converter is changed over to a special heating mode. The changeover to this mode is performed automatically without the need to use special control signals from the upper-level control system, nor does it need to make any additional switching operations in the electric drive's power circuits. The use of the proposed algorithm ensures uniform distribution of heat among all power semiconductors. The thermal images and temperature curves demonstrate the efficiency of this thermal stabilization algorithm in comparison with the usual control algorithm.

Experimental investigation of heat transfer efficiency on the convex surface of the annular channel of varying geometry intensifiers

The work is a continuation of the experimental studies on the enhancement of heat transfer in the fuel assembly on the experimental stand in National Research University "Moscow Power Engineering Institute". The description of the experimental setup, construction and main geometrical parameters of intensifier are presented. The new experimental data on the pressure loss and heat transfer coefficient using an edge enhancer - twisted wire single-phase convection mode are presented. In the research, the range mode parameters and geometric characteristics of the intensifier were extended. The relation of the coefficients of hydraulic resistance and the Nusselt number of steps twist twisted wire was found, the effect of the ribs on the heat transfer coefficient was shown. It is found that for any twist pitch ranging from 20 to 100 mm corresponds to a maximum heat transfer rib height H = 0,35. An increase in the heat transfer coefficient in the convex heating surface was experimentally obtained.

1st International Telecommunication Conference “Advanced Micro- and Nanoelectronic Systems and Technologies”

First International Telecommunication Conference on Advanced Micro- and Nanoelectronic Systems and Technologies took place from December 22nd to December 23rd 2015 at National Research Nuclear University MEPhI (Moscow Engineering Physics Institute). It was organized by the Micro- and Nanoelectronic Department of National Research Nuclear University MEPhI (the oldest Microelectronic department in Russia (USSR).The Conference consists of one plenary and three oral and poster sessions. The plenary session presented the most significant results of Micro- and Nanoelectronic Department MEPHI and other participants. This Conference provides to participants an opportunity to discuss their scientific and technical results in a wide audience of leading industry experts.The main topics of the Conference were:• Semiconductor physics;• Design of micro- and nanosystems;• Manufacturing technology of micro- and nanosystems.More than 150 specialists on Micro- and Nanoelectronics took part in the Conference. They represented leading Russian scientific research centres and universities (such as National Research Center “Kurchatov Institute”, All-Russia Research Institute of Automatics (VNIIA), Bauman Moscow State Technical University, Moscow Aviation Institute (National Research University), Moscow Power Engineering Institute, Moscow State University of Mechanical Engineering (MAMI), D. Mendeleev University of Chemical Technology of Russia and many others) and universities from Armenia, Belarus, Ukraine, Germany, Colombia, Spain, South Korea, Republic of Uzbekistan.We would like to thank all of the speakers, participants and organizing committee members for their contribution to the Conference.

Experimental Study of Intrachannel Separation in a Flat Nozzle Turbine Blade Assembly With Wet Stream Flow1

This is an experimental study of wet steam flows in a nozzle turbine array with an intrachannel separation system that makes it possible to reduce the amount of erosion-hazardous droplets in a turbine stage. Separation is found to affect the parameters of the liquid phase beyond the array. Experiments were done on a test stand at the Moscow Power Engineering Institute with an initial steam humidity of 6.5% and a theoretical Mach number of M 1t = 0.6 beyond the array. Two separation slots at an angle of 90° to the generatrix of the profile surface were made on the concave surface of each blade in the test channel. The effect of the pressure drops in the slots on the wet steam flow downstream of the nozzle blade array was studied and the flow rates of the separated steam and liquid were measured separately. The efflux of the steam-water mixture into the slot was modelled in the ANSYS Fluent CFD computer code. This yielded a more complete picture of the flow structure in the slot and made it possible to explain the behaviors of the experimentally observed separated steam and liquid flows. The velocity distributions of the liquid phase beyond the nozzle were obtained by particle image velocimetry (PIV). The experimental data can be used to modify the parameters of intrachannel separation systems for steam turbine stages and to increase the reliability and operating efficiency of turbine blades.

USE OF MODERN INFORMATION TECHNOLOGIES FOR SIMULATION OF ADVANCED POWER TECHOLOGIES

A server of the Moscow Power Engineering Institute is presented which gives an opportunity to conduct “cloud” simulation of advanced power technologies. Several examples of using such approach are introduced.

Investigation of hydrodynamics and heat transfer at liquid metal downflow in a rectangular duct in a coplanar magnetic field

Hydrodynamics and heat transfer in a liquid metal downflow in a rectangular duct with an aspect ratio of approximately 3/1 in a coplanar magnetic field (MF) are studied upon inhomogeneous (one-sided) heating of the duct. The flow in the heat-transfer duct of the cooling system of a liquid-metal blanket module of the tokamak-type thermonuclear reactor is modeled. Experiments were carried out at the mercury magnetohydrodynamic (MHD) test facility, which is a part of the MHD-complex of Moscow Power Engineering Institute–Joint Institute for High Temperatures of the Russian Academy of Sciences. A probe technique is used for measurements in the flow. The studies are performed within the following ranges of regime parameters: Reynolds numbers Re = 10000–55000, Hartmann numbers Ha = 0–800, and Grashof numbers Grq = 0–6 × 108. Averaged profiles of velocity, temperature, temperature fluctuations of the flow, and duct wall temperature are presented for two typical flow regimes. Detailed measurements are performed in the duct cross-section distant from the heating beginning in the region of homogeneous MF. MF leads to the turbulent transport suppression, owing to which the temperature on the heated wall increases. A considerable influence of the heat-gravitational counter-convection, the interaction of which with the external MF leads in some regimes to the appearance and development of instabilities in the laminarized flow, is revealed under the downflow conditions. Generation of large-scale secondary vortices with the axis parallel to the MF induction causes temperature fluctuations of the abnormal intensity that considerably exceeds the level of turbulent fluctuations. Such temperature fluctuations easily penetrate into the duct wall and can lead to the fatigue breakdown of thermonuclear reactor cooling paths. Ranges of unallowable regime parameters are determined and the boundary in coordinates Gr-Re is presented, where this effect is revealed or vanishes. The numerical simulation of studied parameters is performed under the conditions corresponding to the experiment. Computational results coincide satisfactorily with the experimental data in the flow regimes with large Reynolds numbers, where the effect associated with the development of instabilities caused by the heat-gravitational convection is absent or is relatively small.

State and prospects of basic computer training in engineering education

Basic computer training is an important part of the fundamental training for engineers in each application area. The article shows that the purpose of such training has been always the formation of the basic theoretical concepts and practical skills to solve problems by programming with computers. All the formation periods and the following improvement of basic computer training were analyzed by the example of the National Research University «Moscow Power Engineering Institute» (NRU MPEI). Special role of the structured programming technology is mentioned, the use of which allows you to effectively develop easy understood algorithms and computer programs with a minimal number of errors. Particular attention is drawn to the serious methodological support in the 80th (the last century), the basic computer training of students by the Ministry of Higher Education of the USSR and the Research Institute of Higher School Problems. The important role of methodical councils of universities on the computer technology application to coordinate in those years the basic computer training at the University is mentioned. The article shows the new teaching methods of the main discipline with generally accepted today in Russia term “Informatics”. This method was developed in the National Research University «Moscow Power Engineering Institute» at the Applied Mathematics Department, providing the basic computer training of students in 1–2 semesters. This new teaching method has such a «reference point» as fundamental programming concepts «task – method of this task solution – algorithm for solving the task – computer program». The main tasks of the discipline of the basic computer training were defined: – formation of students’ formal logic, algorithmic thinking; – learning of modern technology of structured programming, providing efficient development of algorithms and computer programs; – formation of practical skills of designing algorithms of any complexity; – learning of procedure-oriented programming languages. The article analyzes some negative aspects, related to basic computer training and appeared in the last 15–20 years in the National Research University «Moscow Power Engineering Institute» and other higher technical educational universities of Russia, including: – subjective diluting effect, changing the purpose and content of basic computer training and replacement by the other, «unconvincing» in the content subjects; – lack of a unified program of discipline «Informatics» for higher technical educational institutions of Russia; – lack of understanding of the specificity of very intensive work of lecturers, conducting such training, and the underestimation of their labor; – insufficient current level of initial computer training for the secondary school graduates; – lack of methodological interaction of higher technical educational universities of Russia among themselves and with the secondary school on basic computer training. The article emphasizes that the basic computer training in engineering education in Russia will be in perspective realized in its classic historical sense of the word, if the qualified engineers, who are able to think logically and resolve efficiently any professional tasks, will be necessary for the country as before.

Implementation HR information system – part of a unified information environment of MPEI

The article is devoted to the unified information environment of National Research University “Moscow Power Engineering Institute” (MPEI), and its most important component – the HR information system. The article describes the architecture of the unified information space of MPEI. The main objective of the development of the HR information system – to provide access to users, including other information systems, to actual information about employees of MPEI. HR information system are based on many years of operating experience of the previous system and the like, are available on the market today, taking into account the decisions of personnel. The earlier HR information system was developed in 1995–1997 and used until mid-2015. In the process of its using it has accumulated a large number of «patches» and requests for revision that was stopped by limitations in the platform and solutions architecture. Comparative analysis of 1C and SAP products showed that the cost of implementation, configuration and maintenance of these products is higher than developing new solutions. Package of Microsoft technology software was chosen as a platform. These technologies have proven themselves in the development of similar projects, and vendor solutions for a long time support all key processes of information systems. Important is the presence of the selected software Microsoft FSTEC certificates (Federal Service for Technical and Export Control), which support the use of these products for storing and processing information in accordance with the laws of the Russian Federation. The MPEI has already implemented a number of systems on the Microsoft platform – postgraduate register, an Internet portal, etc. The use of technology of one supplier facilitates the integration processes and products into a unified information environment. The article details the technical and hardware specifications of the HR information system. The result of the work on the HR information system is stably functioning, supporting all business processes of the subject area and have successfully integrated within other software system. In addition to the «standard» option for storing information about employees («core» fields of the form, documents, various types of information on professional development, incentives, penalties, planned and actual vacations, etc..). HR information system has its own mechanism for the generation of orders and changes as a result of their approval. The subsystem orders included several modules: route editor, layout editor, orders editor, rights editor. Route Editor allows you to describe the route of the order to determine the movement and «point» statement, which if it enters the data into HR information system have to be updated on the basis of the text of the order. Template Editor is used to describe the future of the text of the order, the parameters that must be requested from the members of their processing before entering the text and action in approving an order. The orders editor works on the basis of a template, and provides opportunities for the formation of the order of the text and its harmonization in the course of the route and approval. The rights editor is used to distinguish the rights when dealing with orders subsystem. This article contains more detailed information about the frames of program of HR information system. In conclusion contained the positive experience of exploitation of the system and the introduction of a general trend to develop and support another IT solutions.

Job system generation in grid taking into account user preferences

Distributed computing environments like Grid are characterized by heterogeneity, low cohesion and dynamic structure of computing nodes. This is why the task of resource scheduling in such environments is complex. Different approaches to job scheduling in grid exist. Some of them use economic principles. Economic approaches to scheduling have shown their efficiency. One of such approaches is cyclic scheduling scheme which is considered in this paper. Cyclic scheduling scheme takes into account the preferences of computing environment users by means of an optimization criterion, which is included in the resource request. Besides, the scheme works cyclically by scheduling a certain job batch at each scheduling step. This is why there is a preliminary scheduling step which is job batch generation. The purpose of this study was to estimate the infl uence of job batch structure by the user criterion on the degree of its satisfaction. In other words we had to find the best way to form the batch with relation to the user optimization criterion. For example if it is more efficient to form the batch with jobs with the same criterion value or with different criterion values. Also we wanted to find the combination of criterion values which would give the most efficient scheduling results. To achieve this purpose an experiment in a simulation environment was conducted. The experiment consisted of scheduling of job batches with different values of the user criterion, other parameters of the resource request and the characteristics of the computing environment being the same. Three job batch generation strategies were considered. In the first strategy the batch consisted of jobs with the same criterion value. In the second strategy the batch consisted of jobs with all the considered criteria equally likely. The third strategy was similar to the second one, but only two certain criteria were considered. The third strategy was considered in order to find the most favorable combinations of criteria couples. The experiment showed that the second approach showed the best scheduling results. This may be explained by a smaller degree of competition for similar resources in the case of different criteria combination. Experiment results for criteria couples depend on the considered couple. The best scheduling results for this strategy were shown by criteria couples with job runtime and cost minimization criteria and job completion and cost minimization criteria. The results of the study are a part of course “Computing Systems” at the department of Computing engineering at National Research University “Moscow Power Engineering Institute”. Further studies will be dedicated to the search of optimal correlation between user criteria in one batch.

Исследование поведения фосфатов в барабане котла ТЭЦ МЭИ

Исследование поведения фосфатов в барабане котла ТЭЦ МЭИ

Евгений Александрович Глазунов. К 125-летию со дня рождения

This year marks 85 years of the National Research University “Moscow Power Engineering Institute” (National Research University "MPEI”). The department of engineering drawing was the first among other departments in the MEI, for which it is also the anniversary year. The organizer and the first head of this department from 1930 to 1962 was Eugeniy A. Glazunov - a prominent scientist and educator, engineer and organizer, who celebrates 125 years. At the beginning of 1930 the Department of Electrical Engineering Higher Technical School, which earlier E.A. Glazunov graduated, has been transformed into the Moscow Higher School of Energy, which became soon the Moscow Energy Institute. Eugeniy Glazunov was appointed to the head of the department of descriptive geometry and drawing in MPEI. (Some time this department was called "Technical graphics"). His name is undeservedly rarely mentioned in textbooks and other literature in applied geometry and graphics. But Eugeniy Glazunov was very authoritative in the circle geometry and graphics, and among the heads of departments he was one of the initiators and leaders of the Moscow seminar on descriptive geometry, who published his works, and the head of the department, who generously shared teaching materials with his related institution. But E.A. Glazunov had relatively few publications compared with present time. But there were very capital works. One of them was written in conjunction with the N.F. Chetverukhin and is called "Axonometry." But it was not only an outstanding organizer and teacher, but also a magnitude engineer — designer and practitioner in the field of electrical engineering. He was a team-mate, who developed and marketed the first installation, substation and network of well-known Russian electrification plan — the plan for electrification. Based on his experience and under his leadership tasks on the engineering drawing based on electrical products and parts were improved, and drawing ceased to be exclusively machine-building. His merits in the development of engineering education and his geometry and graphic component were so significant that he was awarded the title of professorship of Higher Attestation Commission without doctoral dissertation. He was also one of the highest awards of that time, the Order of Lenin (1951).

Selection of axial hydraulic turbines for low-head microhydropower plants

The creation of highly efficient hydroturbines for low-head microhydropower plants is considered. The use of uncontrolled (propeller) hydroturbines is a promising means of minimizing costs and the time for their recoupment. As an example, experimental results from Brno University of Technology are presented. The model axial hydraulic turbine produced by Czech specialists performs well. The rotor diameter of this turbine is 194 mm. In the design of the working rotor, ANSYS Fluent software is employed. Means of improving the efficiency of microhydropower plants by optimal selection of the turbine parameters in the early stages of design are outlined. The energy efficiency of the hydroturbine designed for use in a microhydropower plant may be assessed on the basis of the coefficient of energy utilization, which is a function of the total losses in all the pipeline elements and losses in the channel including the hydroturbine rotor. The limit on the coefficient of energy utilization in the pressure pipeline is the hydraulic analog of the Betz–Joukowsky limit, which is widely used in the design of wind generators. The proposed approach is experimentally verified at Moscow Power Engineering Institute. A model axial hydraulic turbine with four different rotors is designed for the research. The diameter of all four rotors is the same: 80 mm. The pipeline takes the form of a siphon. Working rotor R2, designed with parameter optimization, is characterized by the highest coefficient of energy utilization of the pressure pipeline and maximum efficiency. That confirms that the proposed approach is a promising means of maximizing the overall energy efficiency of the microhydropower plant.

Analysis of the effect of hydrophobic properties of surfaces in the flow part of centrifugal pumps on their operational performance

The results of experimental studies focused on evaluating the effect of different conditions of wetting of functional surfaces in flow parts of centrifugal pumps (specifically, impellers) used in heat- and watersupply systems on their operational performance are presented. The conditions of interaction of the pumped medium with the impeller surfaces were altered through hydrophobization of functional surfaces that was implemented using the techniques developed at the Moscow Power Engineering Institute and the Brno University of Technology. It is demonstrated that this hydrophobization produced a considerable positive effect and raised the efficiency of pump units based on centrifugal KM pumps of three different form factors produced by ZAO Pompa (Shchelkovo) and a K centrifugal pump produced by Sigma. The efficiency was increased by 2–6% depending on the pump model. The results of experimental studies of the effect of hydrophobization of the surface of a canonical plate-type domain with a working medium flowing longitudinally along it in a hydrodynamic bed (Moscow Power Engineering Institute) are detailed. Two flat plates with a length of 250 mm and a width of 252 mm were studied. The surfaces of these plates had different roughness values, since one of the plates was polished prior to hydrophobization. Different wetting conditions, which were monitored by measuring the contact angle with a KRUSS MobileDrop goniometer, were established after hydrophobization. The obtained experimental data showed that the surface friction of the modified plate with a higher initial roughness (unpolished plate) was reduced by as much as 23%. This result agrees completely with the Cassie hypothesis.

Unsteady heat transfer during subcooled film boiling

Cooling of high-temperature bodies in subcooled liquid is of importance for quenching technologies and also for understanding the processes initiating vapor explosion. An analysis of the available experimental information shows that the mechanisms governing heat transfer in these processes are interpreted ambiguously; a more clear-cut definition of the Leidenfrost temperature notion is required. The results of experimental observations (Hewitt, Kenning, and previous investigations performed by the authors of this article) allow us to draw a conclusion that there exists a special mode of intense heat transfer during film boil- ing of highly subcooled liquid. For revealing regularities and mechanisms governing intense transfer of energy in this process, specialists of Moscow Power Engineering Institute’s (MPEI) Department of Engineering Thermal Physics conduct systematic works aimed at investigating the cooling of high-temperature balls made of different metals in water with a temperature ranging from 20 to 100°C. It has been determined that the field of temperatures that takes place in balls with a diameter of more than 30 mm in intense cooling modes loses its spherical symmetry. An approximate procedure for solving the inverse thermal conductivity problem for calculating the heat flux density on the ball surface is developed. During film boiling, in which the ball surface temperature is well above the critical level for water, and in which liquid cannot come in direct contact with the wall, the calculated heat fluxes reach 3–7 MW/m2.

New steam silencers developed at MPÉI

Steam silencers are reviewed briefly. Original designs of steam silencers for subcritical and supercritical steam parameters from the Moscow Power Engineering Institute (NIU “MEI”) are discussed. These are described and test results confirming their high efficiency are reported.

Calculating the Dynamic Characteristics of a Boiler-Utilizer at the Novogor’kovskaya Heat and Electric Power Plant

The joint experience of the Machine-Building Factory of Podolsk and the Moscow Power Engineering Institute in developing startup technology for the PK-85 boiler-utilizer (heat recovery steam generator) at the Novogor’kovskaya heat and electric power plant is discussed. Criteria for the operational reliability of the components of the boiler-utilizer under transient conditions are formulated. The effect of regulator controls during startup of the boiler from different thermal states on its dynamic characteristics is studied computationally. Recommendations for the startup of boilers are developed on the basis of these studies and the proposed criteria.

Temperature fluctuations in a liquid metal MHD-flow in a horizontal inhomogeneously heated tube

The investigation of heat transfer characteristics during liquid metal flow in a horizontal tube with one-sided heating of the lower half of the tube is carried out. Experimental investigations are conducted using the mercury MHD complex of the Moscow Power Engineering Institute and the Joint Institute for High Temperatures, Russian Academy of Science, in the context of a long-term collaboration program. The characteristics of the averaged and fluctuation temperatures are considered in different sections over the length of the heating zone in the area of a homogeneous transverse magnetic field. The laminar liquid metal flow revealed the occurrence and development of a low-frequency quasi-harmonic temperature fluctuation with great intensity.

Experimental investigations of heat transfer and temperature fields in models simulating fuel assemblies used in the core of a nuclear reactor with a liquid heavy-metal coolant

The aim of this experimental investigation is to obtain information on the temperature fields and heat transfer coefficients during flow of liquid-metal coolant in models simulating an elementary cell in the core of a liquid heavy metal cooled fast-neutron reactor. Two design versions for spacing fuel rods in the reactor core were considered. In the first version, the fuel rods were spaced apart from one another using helical wire wound on the fuel rod external surface, and in the second version spacer grids were used for the same purpose. The experiments were carried out on the mercury loop available at the Moscow Power Engineering Institute National Research University’s Chair of Engineering Thermal Physics. Two experimental sections simulating an elementary cell for each of the fuel rod spacing versions were fabricated. The temperature fields were investigated using a dedicated hinged probe that allows temperature to be measured at any point of the studied channel cross section. The heat-transfer coefficients were determined using the wall temperature values obtained at the moment when the probe thermocouple tail end touched the channel wall. Such method of determining the wall temperature makes it possible to alleviate errors that are unavoidable in case of measuring the wall temperature using thermocouples placed in slots milled in the wall. In carrying out the experiments, an automated system of scientific research was applied, which allows a large body of data to be obtained within a short period of time. The experimental investigations in the first test section were carried out at Re = 8700, and in the second one, at five values of Reynolds number. Information about temperature fields was obtained by statistically processing the array of sampled probe thermocouple indications at 300 points in the experimental channel cross section. Reach material has been obtained for verifying the codes used for calculating velocity and temperature fields in channels with an intricately shaped cross section simulating the flow pass sections for liquid-metal coolants cooling the core of nuclear reactors.