Engines, Energy and Thermotechnics

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 …

Use of thermal energy for blowing fuel tanks of rocket engines Yurii Mitikov ORCID: https://orcid.org/0000-0002-4787-603X Oles Honchar Dnipro National University Maksym Sedchenko ORCID: https://orcid.org/0009-0008-0027-0939 Oles Honchar Dnipro National University Yevhen Krupkin ORCID: https://orcid.org/0009-0002-7344-1061 Dniprovsk State Technical University The use of thermal energy for pressurizing fuel tanks in rocket propulsion systems is a crucial topic in the field of space technology. It encompasses various aspects of thermodynamics, materials engineering, and fluid and gas mechanics. This study examines the fundamental principles and …

Experimental Study of Throttling of Solid Fuel Direct-Flow Steam Boilers Stanislav Bilohurov ORCID: https://orcid.org/0000-0002-2753-389X Oles Honchar Dnipro National University Oleksandr Myshenko ORCID: https://orcid.org/0009-0003-7559-1407 Oles Honchar Dnipro National University Serhii Bardakov ORCID: https://orcid.org/0009-0001-9367-1414 Ukrainian State University of Chemical Technology The object of study of this work is the thermophysical processes of water boiling in narrow channels and its phase transition at variable heat flux and steam consumption. The use of traditional steam drum boilers is becoming more problematic, both in terms …

Towards a comprehensive transient model of a large five-legged transformer under no-load conditions Serhii Zirka ORCID: https://orcid.org/0000-0001-7607-1436 Oles Honchar Dnipro National University Dennis Albert ORCID: https://orcid.org/0000-0001-8916-851X OMICRON electronics GmbH, Klaus, Austria Large power transformers are related to the most responsible and expensive elements of electrical networks. Long-term operation of transformers without shutdowns requires taking into account energy losses in these devices and places high demands for the reliability of their modeling. The aim of this paper is to improve the …

Research on the Impact of Laboratory Testing Conditions on the Operating Parameters of the ST-25 Hall Effect Motor Viktor Pererva ORCID: https://orcid.org/0000-0001-8803-5360 Oles Honchar Dnipro National University Oleksandr Petrenko ORCID: https://orcid.org/0000-0001-5648-5068 Oles Honchar Dnipro National University The object of the study was the Hall-effect thruster ST-25, developed by Flight Control LLC (Ukraine), with a discharge power limit of up to 200 W. This research focused on examining the influence of residual gas pressure in various vacuum chambers on the operational …