Vol. 6, no. 3, 2022
OMSK SCIENTIFIC BULLETIN. SERIES «AVIATION-ROCKET AND POWER ENGINEERING»
CONTENTS
POWER AND CHEMICAL ENGINEERING
|
V. I. Kuznetsov, I. O. Shchuka Optimization of the operation of the compressor diaphragm unit pumping gas and liquid in rocket complexes by means of a pressure jump calculation program DOI: 10.25206/2588-0373-2022-6-3-9-16 The issue of increasing the service life of the membrane in a diaphragm-plunger compressor is considered. It is found that the uniform distribution of holes in the substrate for the supply of oil to one cavity and gas to the other cavity, which are located between the membrane and the substrates, causes a wavelike movement of the membrane. It is shown which process causes the occurrence of pressure surges that shorten the life of the mekmbran6a to destruction. Theoretically and experimentally, the optimal arrangement of holes in the substrates has been found to reduce pressure surges and increase the service life of the membrane without destruction. Keywords: diaphragm-plunger compressor, resource, membrane, substrate, distribution disk, holes. |
9-16 |
|
V. V. Shalay, V. I. Gorbunkov, I. V. Kolganov Mathematical modeling of plasma thruster device thermal processes DOI: 10.25206/2588-0373-2022-6-3-17-23 A mathematical model of thermodynamic processes occurring in the arcjet thruster device with using argon for arcjet working process carring out. A comparative analysis of the results of experimental data with theoretical data has been carried out. The purpose of the study is to develop a mathematical model of thermodynamic processes in the arcjet thruster device and simulate the interaction of argon with arc discharge plasma. The comparative analysis of the calculated parameters, thanks to the proximity of electron temperature values with the previously experimentally obtained under the static state in the arcjet thruster device, confirms the reliability of the presented mathematical model of plasma processes and the need for its improvement. Keywords: arcjet plasma thruster, gas and electron temperature, thermal equilibrium, specific impulse, argon plasma, thermal model arcjet plasma thruster. |
17–23 |
|
V. L. Yusha Scientific and technological prerequisites for improvement and industrial development of low-flow compressor units based on long-stroke piston stages DOI: 10.25206/2588-0373-2022-6-3-24-39 An overview analysis of research and development in the field of air and refrigeration low-flow compressors based on low-speed long-stroke piston stages is presented and an assessment of scientific and technological prerequisites for improving their energy efficiency and competitiveness is carried out. Two promising directions are considered in which such compressors can find effective application: increasing the gas pressure from atmospheric pressure to medium and high pressures; implementation of combined processes of compression and condensation of refrigerants in the working chamber of the stage. A number of scientific problems have been proposed and substantiated, the solution of which will make it possible to create competitive compressor units applicable in refrigeration and cryogenic engineering, thermostatting and life support systems, medicine and pharmaceuticals, petrochemical and oil and gas industries, small- scale energy, transport. Keywords: low-flow compressor, piston low-speed long-stroke stage, work processes, medium and high discharge pressure, «quasi-isothermal» compression, air, refrigerant, refrigeration cycle, compression in the area of wet steam. |
24–39 |
|
S. S. Busarov, I. S. Busarov, A. V. Nedovenchany, R. E. Kobylskiy, A. A. Kapelyukhovskaya, E. V. Zaushitsyn, A. E. Gagloyeva, A. Yu. Gromov Creation methodology for calculating methane low-flow low-speed compressor stages based on data processing of experimental study DOI: 10.25206/2588-0373-2022-6-3-40-48 This article presents the results of a set of works carried out to adapt the existing mathematical model for calculating the working processes of low-speed compressor stages for methane compression and to create an engineering methodology for calculating the performance of the stage based on the experimental data obtained. Keywords: long-stroke reciprocating compressor, operating processes, measurement of instantaneous temperature and gas pressure, experimental studies of reciprocating compressors, methane. |
40–48 |
|
D. Kh. Sadvakasov, G. I. Chernov, V. L. Yusha The analysis of the effect of high-speed ammonia low-speed compressor stage on the processes of reverse expansion and suction in wet steam region DOI: 10.25206/2588-0373-2022-6-3-49-57 The paper presents the analysis of influence of the method of calculating the heat transfer coefficient on mathematical modeling of the process of reverse expansion of ammonia in the working chamber of the reciprocating compressor stage (in the area of wet steam). Alternative variants of film and drip schematization of the heat exchange process are considered. The mathematical model is based on the equations of the first law of thermodynamics for a body of variable mass, the equation of state of a real gas, the Clapeyron–Clausius and Newton–Richman equations. Based on the results of the computational and parametric analysis, the applicability of known methods for calculating the heat transfer coefficient to the object under consideration is evaluated. Keywords: ammonia, wet steam, superheated steam, reverse expansion process, mathematical model, heat transfer coefficient, film schematization, drip schematization. |
49–57 |
|
O. Yu. Manikhin, V. V. Shalay, E. V. Khodоreva Selection the method of natural gas preparation for transportation through main gas pipelines DOI: 10.25206/2588-0373-2022-6-3-58-65 When designing natural gas drying equipment, the possibility of implementing an integrated approach to determine the rational technical and economic indicators of the technological devices under consideration is of great importance. This makes it possible to achieve maximum energy efficiency from the operated equipment for each specific field. One of the important tasks to be solved in the development of gas fields is the choice of a method and appropriate technological equipment according to a variety of criteria, including operating costs and the cost of devices, plant performance, metal consumption, replicability of the technology in question, etc. One of the ways to solve such a problem is the application of mathematical methods of system analysis in complex decision-making problems, in particular, the method of analyzing hierarchies. Keywords: natural gas drying, absorption, low-temperature separation, membranes, hierarchy analysis methods. |
58-65 |
|
B. Cui, K. Becker, U. Lüdersen, M. Gottschlich, S. Kabelac A study on the kinematics of a new Schukey-type rotary compressor / trans. from Engl. M. A. Fedorova DOI: 10.25206/2588-0373-2022-6-3-66-75 A new type of rotary compressor, called «rotary-chamber compressor», consists of two interlocking rotors with 4 wings each, that perform non-uniform rotary movements. Both rotors have the same direction of rotation, while one rotor is accelerating, the other rotor is retarding. After surpassing a specific mark, the sequence changes and the leading rotor begins to retard and vice versa. Due to the resulting relative phase difference, the volume between the two wings is changing periodically, which allows pulsating working chambers. The technology was first introduced by its founder Jürgen Schukey in 1987. Since then, no further development on this machine is known to us except our own. In this contribution, a study on the kinematics of the rotary-chamber-compressor is presented. Initial studies have shown that changes in the kinematics of the rotors will have a direct influence on the thermodynamical variables, which, if optimized, can lead to an increased performance of the machine. Therefore, a mathematical model has been developed to obtain the performance parameters from different kinematic concepts by using numerical CFD analysis. Furthermore, additional optimization possibilities will be listed and discussed. Keywords: rotary-chamber compressor, gearbox with special toothed gears, non-uniform rotary movements, kinematics, compression cycle, mathematical model, CFD analysis. Printed by permission from the authors and the Centre for IOP Conference Series Materials Science and Engineering (International Conference on Compressors and their Systems) (London, 2021) |
66-75 |