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Information × Registration Number 0225U001423, (0123U100514) , R & D reports Title Synergetics of the vortex state of gradient multiphase flows popup.stage_title Встановлення взаємозв’язку між нестаціонарною вихровою структурою течії і динамічними характеристиками обтічного профілю. Head Voropaiev Hennadii О., д.ф.-м.н. Registration Date 31-01-2025 Organization The Institute of Hydromechanics of the National Academy of Sciences of Ukraine popup.description1 Construction of a model of the vortex state of gradient and multiphase flows, the vortex structure of which is considered as an open system of interacting components, which allows both the exchange of energy of the system as a whole with the external environment, and the non-linear redistribution of energy between its components, depending on the flow conditions and the structure of the environment. popup.description2  The object of research is vortex flows. The purpose of the work is to build a model of the vortex state of gradient multiphase flows, to study the regularities of the formation of spatial and temporal scales of vortex structures in the flow near the surface of bodies depending on the physical properties of the liquid medium, as well as the influence of vortex structures on the hydrodynamic resistance of moving bodies, on convective heat transfer in elements of power equipment. The research method is a physical and numerical experiment to study the vortex structure of the flow in near-wall unsteady and non-isothermal flows. At the second stage of the topic, the features of intense vortex motion around wing profiles with geometric inhomogeneities of the leading edge, with forced oscillations with different frequencies and amplitudes, when moving near the screen at different angles of attack, were experimentally and numerically studied. The corresponding changes in the forces acting on the wing profiles were analyzed. The formation and development of a vortex structure in a three-dimensional trench in the initial section of a smooth channel depending on the aspect ratio is investigated, the influence of transverse inhomogeneity in the cavity on the stability of the downstream boundary layer is shown. The influence of the shape of the cavity walls on the generated additional drag of the streamlined surface is studied. Product Description popup.authors Baskova Oleksandra О. Voskobiinyk Andrii V. Dymytriieva Nataliia F. Zahumennyi Yaroslav V. Korobov Vitalii I. Paramonov Yurii O. Rozumniuk Nataliia V. Shkvar Yevhenii O. popup.nrat_date 2025-01-31 Close