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Influence of coolant supply mode on thermal protection efficiency in reactive high-temperature flowстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Mikhalchenko E.V., Smirnova M.N., Skryleva E.I., Wang F.
- Журнал: Acta Astronautica
- Том: 239
- Год издания: 2025
- Издательство: Pergamon Press Ltd.
- Местоположение издательства: United Kingdom
- Первая страница: 470
- Последняя страница: 477
- DOI: 10.1016/j.actaastro.2025.11.009
- Аннотация: The space flight safety is critically dependent on the reliability of propulsion systems, where the key element ensuring functionality is the effective operation of the thermal management system. The reliability of a propulsion system is directly determined by the performance of its cooling system, as thermal conditions dictate the integrity of structural materials and the stability of operational parameters. The consequence of a cooling system failure is the immediate destruction of the engine. Even a partial failure can lead to thrust loss, failure to reach the target orbit, and the complete failure of a costly project. Transpiration cooling represents a promising methodology in the development of highly efficient thermal protection systems. Key research aspects in this field include not only the optimization of coolant parameters, material porosity, and hydrodynamic flow characteristics but also the analysis of the interaction between the injected coolant and the reactive medium. This study presents a comprehensive numerical investigation aimed at analyzing the influence of a porous insert installed within a channel on the characteristics of a high-temperature flow containing unburned components. This flow consists of incomplete combustion products that retain significant thermal and chemical potential. A key aspect of this work is the comparative analysis of the effectiveness of different cooling agents injected through the porous structure. Three fundamentally distinct types of gases were considered as coolants: a combustible gas (acetylene), an oxidizer (oxygen), and an inert gas (nitrogen). The study examines the hybrid supply method when a configuration where oxidizer (oxygen) is supplied through one insert, while inert gas (nitrogen) is injected through another. This combination is of great practical interest as it allows to evaluate the combined effect by combining chemical interaction (afterburning of residual fuel in the oxidizer zone) with subsequent inertial thermal shielding using nitrogen.
- Добавил в систему: Скрылева Евгения Игоревна