Yu. N. Shevchenko
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View article: Research of viscous incompressible fluid flow in the lateral rotation cavity of centrifugal pumps and gas turbines of liquid rocket engines based on the spatial boundary layer theory
Research of viscous incompressible fluid flow in the lateral rotation cavity of centrifugal pumps and gas turbines of liquid rocket engines based on the spatial boundary layer theory Open
The flow of a viscous incompressible liquid in the lateral cavity of rotation of centrifugal pumps and gas turbines of liquid rocket engines is considered. Based on the theory of the spatial boundary layer, a system of equations has been d…
View article: Power engineering of the tangential supply device of the microturbine of the thermal control system of a promising spacecraft
Power engineering of the tangential supply device of the microturbine of the thermal control system of a promising spacecraft Open
This paper presents an overview of the current technical problem related to two-phase spacecraft thermal control systems and possible technical applications of thermal energy recovery in the organic Rankine cycle as an integral part of the…
View article: Computational and experimental study of swirling ring flow
Computational and experimental study of swirling ring flow Open
In the course of work on the energy perfection of thermal control systems for spacecraft with a twophase circuit, the issue of partial regeneration of thermal energy into electrical energy in a low-speed turbogenerator is considered, part …
View article: Design of a thermal control system with a two-phase coolant for a spacecraft with a capacity of 7 kW
Design of a thermal control system with a two-phase coolant for a spacecraft with a capacity of 7 kW Open
This article presents a methodological approach to designing a spacecraft thermal control system with coolant pumping with a cooling capacity of up to 7.0 kW. Two design options are considered. There is no airtight instrument container in …
View article: Velocity coefficient of tangential supply of subsonic centripetal turbine
Velocity coefficient of tangential supply of subsonic centripetal turbine Open
Today, in the spectrum of tasks solved by orbital spacecraft, there is a direction associated with an increase in both functional and thermal power radiated by the thermal control system into outer space. At thermal power more than 7 kW, t…
View article: Analysis of the key design features of low-power turbines for electricity generation
Analysis of the key design features of low-power turbines for electricity generation Open
The paper presents an analysis of the design features of turbines for low-power electricity generation systems (up to 10 kW). The specifics of the working process of this type of turbines is described. The basic requirements for the design…
View article: Effective use of working capital of a construction company as a factor of economic security
Effective use of working capital of a construction company as a factor of economic security Open
The article presents theoretical approaches to defining the concept of "economic security of a construction company" and its impact on working capital. On the basis of the analysis of the state of economic security and the main financial a…
View article: Schizophrenia-like disorder in Wilson's disease
Schizophrenia-like disorder in Wilson's disease Open
Wilson's (Wilson–Konovalov) disease (WD) is a chronic progressive disease resulting from impaired body copper metabolism with damages to target organs (liver, brain, and kidneys). The paper describes a clinical case of organic delusional (…
View article: Materials science in the field of heat-resistant austenitic alloys
Materials science in the field of heat-resistant austenitic alloys Open
Centrifugally cast pipes from heat-resistant steels and alloys are widely used in many branches of engineering. These are radiation pipes in thermal furnaces with a protective atmosphere, bottom rollers in continuous thermal and heating fu…
View article: Optimization of carbon dioxide compressing technology in the production of urea
Optimization of carbon dioxide compressing technology in the production of urea Open
In the article the questions of optimization of technological schemes of obtaining liquid carbon dioxide directed to the carbamide synthesis plant are considered. The main drawback of traditional technical solutions is high energy costs, m…
View article: Combined production of ammonia and methanol as the way to deal with the greenhouse gas
Combined production of ammonia and methanol as the way to deal with the greenhouse gas Open
Technological processes in the energy sector and at the enterprises of nitrogen fertilizers, accompanied by the release of large amounts of greenhouse gas - carbon dioxide into the atmosphere are considered. Optimal options for its utiliza…
View article: NEW ENGINEERING SOLUTIONS FOR PRODUCING HIGH-PRESSURE CARBON DIOXIDE
NEW ENGINEERING SOLUTIONS FOR PRODUCING HIGH-PRESSURE CARBON DIOXIDE Open
View article: THE REDUCTION OF ENERGY CONSUMPTION WHEN PRODUCING LIQUID CARBON DIOXIDE AT THE AMMONIA UNITS
THE REDUCTION OF ENERGY CONSUMPTION WHEN PRODUCING LIQUID CARBON DIOXIDE AT THE AMMONIA UNITS Open
The relevance of the issue selected for the study is related directly to the transition of industrial enterprises to the energy saving technologies. It is relevant to the chemical enterprises as well. The paper presents a number of technol…
View article: Procedure of Forecasting Operational and Extremal State of Critical Systems of the Rocket Technique Under Repeated Thermo-Force Loading
Procedure of Forecasting Operational and Extremal State of Critical Systems of the Rocket Technique Under Repeated Thermo-Force Loading Open
Запропоновано математичну модель для дослідження термопружнопластичного напружено-деформованого
\nстану та міцності систем ракетної техніки при повторних пусках, яка дозволяє оцінити ресурс конструкції. Використано рівняння теплопровідност…
View article: Prediction of Operational and Emergency States of Rocket Equipment Critical Systems Under Repeated Thermal and Power Load
Prediction of Operational and Emergency States of Rocket Equipment Critical Systems Under Repeated Thermal and Power Load Open
A mathematical model for studying the thermal elastic and plastic stress-strain state and the strength of the rocket equipment systems at restarts has been proposed using the heat conductivity equations and the constitutive equations of th…