Engines, Energy and Thermotechnics

Analysis of the possibility of improving rocket engine nozzles Oleksandr Zolotko ORCID: https://orcid.org/0009-0008-5600-500X Oles Honchar Dnipro National University It is possible to significantly increase the impulse characteristics of the rocket engine due to the use of effective nozzles in which the flow of atmospheric air optimizes the jet. The purpose of the work is to analyze the characteristics of slotted nozzles, nozzles with ground and height contours, nozzles with a central body, nozzle blocks with nozzles covered by a common …

The problem of combustion instability in liquid rocket engines Samir Vekilov ORCID: https://orcid.org/0000-0001-5736-6300 Oles Honchar Dnipro National University Volodymyr Lipovskyi ORCID: https://orcid.org/0000-0002-7939-7973 Oles Honchar Dnipro National University Roman Pustovyi ORCID: https://orcid.org/0009-0002-6066-9788 Dnipro Aerospace LLC, Ukraine The purpose of this work is to carry out an overview on combustion instability in liquid propellant rocket engines, its classification, the main principles of occurrence as well as ways to prevent the phenomena while designing of the prospective engine. A new approach is based …

Determination of the components to be taken into account when calculating the total mass of working substance of an electric propulsion system based on a Hall thruster Serhii Asmolovskyi ORCID: https://orcid.org/0009-0000-5423-9365 Oles Honchar Dnipro National University Serhii Bondarenko ORCID: https://orcid.org/0009-0007-2478-0290 Oles Honchar Dnipro National University The total impulse is one of the main requirements for a spacecraft propulsion system. Its fulfillment depends on the specific impulse of the thruster and the propellant mass. The propellant mass consists of a working …

Mathematical model of the propellant tank pressurization system with respect of heat exchange Vitalii Alieksieienko ORCID: https://orcid.org/0009-0000-8317-0096 Oles Honchar Dnipro National University Valerii Bucharskyi ORCID: https://orcid.org/0000-0002-8245-5652 Oles Honchar Dnipro National University The pressurization system for launch vehicle fuel tanks is designed to maintain excess pressure in the gas cushion of the tanks according to the calculated dependency, determined by the requirements for the supply of fuel components and the tank design. To achieve this, it is necessary to coordinate the …

Differential model of the LPRE chamber cooling channel Valerii Bucharskyi ORCID: https://orcid.org/0000-0002-8245-5652 Oles Honchar Dnipro National University Volodymyr Sliusariev ORCID: https://orcid.org/0009-0004-2883-7467 Oles Honchar Dnipro National University In a liquid rocket engine, the cooling channels of the chamber significantly impacts various system parameters. It limits the permissible mass ratio of fuel components, affects the required pump power, and largely determines the layout and weight of not just the chamber, but the entire engine. Consequently, due to the numerous interrelated parameters, making …

Research and prospects for the use of autonomous low-power wind power plants Oleksandr Ponomarov ORCID: https://orcid.org/0000-0002-1032-5074 Oles Honchar Dnipro National University Denys Sukhov ORCID: https://orcid.org/0009-0009-3669-9742 Oles Honchar Dnipro National University The work is devoted to the development and implementation of new promising energy-efficient technologies, namely the use of wind energy in low-power autonomous power plants, for energy supply to remote consumers, mobile points of special services, etc. Autonomous energy installations of this type can also be useful for small private …