Версия для печати

Vol. 8, no. 2, 2024

OMSK SCIENTIFIC BULLETIN. SERIES «AVIATION-ROCKET AND POWER ENGINEERING»

CONTENTS

POWER AND CHEMICAL ENGINEERING

V. R. Vedruchenko, E. M. Rezanov, A. P. Starikov, A. V. Kushnarenko, P. A. Surovtsev, V. A. Kikhtenko On the choice of the method of dynamic rationing of energy resources in oil refineries DOI: 10.25206/2588-0373-2024-8-2-5-12 The article discusses the possibility of calculating the expected energy demand based on big data and machine learning for the energy technological processes in oil refineries. In order to obtain predictive data, linear regression, machine learning, and neural networks are proposed to be used to build a mathematical model. The advantages and disadvantages of these methods are discussed, and the accuracy of the models is compared with the possibility of interpreting them. Thanks to the use of advanced statistical methods, the variability of energy consumption can be interpreted through factor analysis. Through pilot tests, the practical significance of these proposed methods for their practical use in an energy management system is demonstrated, as well as the transition to statistical control of the process. Keywords: rationing of energy resources, fuel and energy resources, rationing methods, linear regression, machine learning, deep learning, factor analysis, energy management system.	5-12
V. L. Yusha, S. S. Busarov, A. V. Nedovenchany The analysis of the main directions for reducing the intensity of mass flows of the working fluid through leaks in the working chamber of a piston long-stroke low-speed compressor stage DOI: 10.25206/2588-0373-2024-8-2-13-21 The working processes and integral characteristics of piston long-stroke low-speed compressor stages are considered. Well-known technologies for increasing the feed rate are considered as objects of comparison: selection of the main dimensions and parameters of the stage; changing the size and design of valves, using elastomeric structural materials; change in the design of the cylinder-piston seal; changing the layout of the suction valve in the working chamber. Indicator efficiency, supply coefficient and tightness coefficient, as well as discharge temperature are considered as integral indicators. The following independent parameters are considered: parameters of the state of the working fluid at suction, discharge pressure, main dimensions and parameters of the stage, distance from the suction valve to the top dead center, seat diameters of the suction and discharge valves, as well as physical and mechanical properties of structural materials.A comparative analysis of the efficiency of the working process of the stage under consideration is carried out using various technologies for reducing the intensity of mass transfer through leaks in the working chamber of a low-speed, long-stroke piston stage. An assessment is made of the achievable value of the feed coefficient with the combined use of various technologies. The features of the working processes of the object under consideration and the relationship between the intensity of mass flows of working gas through leaks in the working chamber of the stage and the technologies used have been studied. The presented results of the theoretical analysis reflect the nature of the change in the integral characteristics of the stage depending on the technologies used to reduce the intensity of mass transfer through leaks in the working chamber of the stage under consideration. Keywords: piston compressor, low-speed long-stroke stage, work processes, mathematical modeling, leaks, flow rate, valves, seals, main dimensions and parameters.	13–21
S. S. Busarov, A. A. Kapelyukhovskaya, V. V. Voronin, K. A. Bakulin, N. G. Sinitsin Reducing gas pressure pulsations in the suction line of a piston compressor when using throttle washers DOI: 10.25206/2588-0373-2024-8-2-22-29 This article discusses the problem of combating pressure fluctuations in the suction line of piston compressors. As you know, incorrect calculation of communications can lead to accidents of compressor equipment. Therefore, special attention must be paid to the layout of pipelines and equipment, while avoiding resonance phenomena. One way to combat pressure pulsations in the suction line is to install diaphragms. This method is the cheapest and easiest to implement, especially for compressors already in operation. The experimental studies carried out confirmed the known data that the area of the diaphragm opening should be four times smaller than the diameter of the pipeline. At the same time, a threefold reduction in the amplitude of pressure fluctuations is achieved. Installation of a diaphragm design with parameters close to the recommended ones is possible anywhere in the suction line, since the change in amplitude at different pressure from the suction valves does not exceed 5...7 %. When installing a diaphragm with dimensions different from those recommended, it is necessary to install it closer to the suction valve. Keywords: piston stage, experimental studies, pressure pulsations, suction line, throttle washer, diaphragm, pressure waves.	22–29
A. D. Vanyashov, I. A. Yanvarev Problems of consistency of gas dynamic characteristics of centrifugal compressor sections and selection of anti-surge control valves DOI: 10.25206/2588-0373-2024-8-2-30-37 Options of approach to selection of standard size of anti-surge control valves in relation to two-section (two-shell) centrifugal compressor unit with three control circuits (first section, second section, general circuit) are considered. The problems arising from valve selection due to incorrect calculation of gas dynamic characteristics of compressor sections are shown. Field of application — natural and associated gas production and compression facilities. Keywords: anti-surge valve, gas dynamic characteristic, gas compressor unit, recirculation line, compressor station, compressor unit, centrifugal compressor.	30–37
E. N. Slobodina, A. G. Mikhailov, E. A. Rogachev, A. M. Paramonov, E. A. Gass The study of heat transfer intensification during boiling of a nanofluid on a heating surface with a nanorelief DOI: 10.25206/2588-0373-2024-8-2-38-44 The study of the boiling liquids processes is currently relevant, as it affects many energy areas and can offer new ways to improve the efficiency of energy plants. The properties and the nanolayer formation processes on the heater surface are the area of interest. Modification of the heater surface in power machinery with the formation of a porous layer on them is more promising than using nanofluid as a heat transfer fluid. The research of the nanolayer formation a during boiling provides insights into its properties and its effect on heat transfer during boiling. It has been experimentally established that when the suspension boils, porous deposits form on the heat exchange surface. Initially, the roughness caused by the deposition of nanoparticles increases, but after a while it begins to decrease due to the alignment of the sediment profile. Keywords: nanofluid, nanoparticles, saturation temperature, boiling, heat transfer, heat transfer coefficient.	38–44
A. S. Zolotukhin, E. I. Davletgareeva, F. A. Malyshev Consideration of the effect of manufacturing deviations from the shape of a multistage axial compressor DOI: 10.25206/2588-0373-2024-8-2-45-51 The paper presents the results of influence for manufacturing deviations from the shape of the flow part – cavities obtained during the refinement of the material part of the multistage axial compressor GTE-65.1. An approach to the mathematical description of cavities is described, consisting of four steps. This approach allows us to gradually determine the influence of the deviation on the characteristics of the compressor. For each of the four steps the integral characteristics of the compressor deviations in efficiency and the total pressure ratio are compared to the base geometry. The change in the stability of the compressor is analyzed, taking into account the cavities under consideration. The analysis of changes in the parameters of the compressor stages is carried out. Keywords: axial compressor, GTE-65.1, shape deviation, CFD, ANSYS CFX, mathematical modeling.	45–51
N. A. Kudla, A. V. Burakov Selecting a method for reducing friction in rotary refrigeration compressors developed for import substitution DOI: 10.25206/2588-0373-2024-8-2-52-60 The article discusses one of the methods for reducing friction, used for newly developed rotary compressors as part of import substitution work. The experience of using rotary refrigeration compressors is analyzed and the main factors determining refrigeration capacity are identified. Methods used in aerospace engineering and power engineering to reduce friction and increase the service life of mechanical elements and assemblies using metallic and non-metallic materials have been identified, and the most promising materials and development trends have been analyzed. A fairly common method of reducing friction, based on the weariness effect, is chosen for study. Based on already known results, a technical solution based on the wear-free effect has been proposed to reduce friction of a refrigeration compressor with a rolling rotor. Keywords: compressor, refrigeration, rotary, efficiency, wearlessness effect, rolling-rotor compressor, metal-clad.	52–60

AVIATION AND ROCKET-SPACE ENGINEERING

V. V. Makarov, V. I. Kuznetsov, I. O. Kuznetsova
Criteria base of the Hartmann–Sprenger pipe workflow
DOI: 10.25206/2588-0373-2024-8-2-61-67
The issue of creating a criteria base for the Hartmann–Sprenger pipe workflow based on a closed mathematical model is considered. On the basis of a closed mathematical model, the main parameters affecting the increase in the total temperature of the gas at the end of the dead-end cavity above the deceleration temperature of the incoming flow are recorded. Parameters with the same dimension are combined into one group so that only one dimensionless complex is obtained for all these quantities. Finding dimensionless complexes based on the modeling theory allowed us to determine the criteria base of the Hartmann–Sprenger pipe workflow.

Keywords: criterion base, Hartmann–Sprenger tube, dead-end cavity, increased braking temperature, work exchange, heat exchange.

61-67

V. V. Fedyanin, V. V. Shalay, V. K. Fedorov
Quantum-mechanical model of ion thruster for small spacecraft
DOI: 10.25206/2588-0373-2024-8-2-68-76
The article presents a quantum mechanical model of an ion thruster. The basic equations describing the shape of the accelerated beam are considered. Detector plates demonstrating the interference pattern in thin films are presented. A mathematical description of the relief of thin films is given using the resulting wave function. The operation of a low-power ion engine is demonstrated. The results of numerical solution of the model with different initial values are shown. Based on the results of calculations, diagrams of the trajectories of charged particles are constructed.

Keywords: models of ion and plasma thruster, mathematical modeling of the motion of charged particles, ion engine, small spacecraft, quantum mechanics, quantum mechanical model.

68-76