Персона: Митрофанова, Ольга Викторовна
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Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
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Руководитель научной группы "Моделирование процессов гидродинамики и теплообмена в судовых ядерных энергетических установках"
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Ольга Викторовна
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- ПубликацияОткрытый доступModeling of Thermal-Hydraulic Processes in the Marine Power Installation Elements(2020) Mitrofanova, O. V.; Bayramukov, A. S.; Ivlev, O. A.; Urtenov, D. S.; Fedorinov, A. V.; Митрофанова, Ольга Викторовна; Федоринов, Андрей Витальевич© 2020 Institute of Physics Publishing. All rights reserved.The results of the current study presented the hydrodynamics and heat transfer features occur in the pipe systems of the thermal-hydraulic various elements of the ship nuclear power installations. A comparative analysis of the turbulent models choice, their approbation on typical elements of the curved pipelines, and comparison of the calculation results with experimental data were fulfilled. The conditions of the swirl flow crisis were determined on base of obtained results of theoretical studies and comparison with experimental data. The mechanism of occurrence of acoustic oscillations generated by large-scale vortex structures and causes of cyclic thermal loads were identified. The fundamental nature of the research, the use of the thermodynamic approach and the conclusions of the stability theory made it possible to predict the results of numerical calculations.
- ПубликацияТолько метаданныеInfluence of pipeline geometry on hydrodynamics and heat transfer processes by an example of a ship steam generator(2021) Mitrofanova, O. V.; Fedorinov, A. V.; Митрофанова, Ольга ВикторовнаAbstract The theoretical and computational analysis proposed in this work is aimed at identifying the features of thermal and hydrodynamic processes carried out in the steam-generating channels of the ship type water-moderated nuclear power installations. It is shown that the complex geometry of the thermohydraulic tract curvilinear channels of the steam generating system has a significant effect on the efficiency of the transport nuclear power installation. In addition to the formation of large-scale vortex structures and swirling flow in the pipeline, the phenomenon of the swirling flow crisis is revealed, under which the low-frequency component of the acoustic spectrum is enhanced. The scientific and applied significance of the proposed research is associated with the need to ensure a wide range of operational changes in efficient and safe operation power modes of icebreaker nuclear power installations. The research, aimed at developing the principles of physical and mathematical modeling of complex vortex flows, is necessary to optimize the design parameters of the thermal power equipment elements of new generation ship nuclear power installations in order to ensure increased safety and reliability of their operation.
- ПубликацияОткрытый доступSwirl Flow Crisis and Its Manifestation in Various Energy Systems(2020) Mitrofanova, O. V.; Bayramukov, A. S.; Митрофанова, Ольга Викторовна© 2020 Institute of Physics Publishing. All rights reserved.Conducted analytical studies have shown that in complex geometry channels with three-dimensional curvature, and a variable cross-section area, the conditions leading to large-scale vortex formation and swirl flow. In this case, not only the mode of swirl flow can be implemented, but also the effect of locking the flow due to the crisis of the swirl flow. It is shown that the crisis of swirl flow can take place in various power, motor, chemical-technological devices and other technical devices associated with the use of high-speed swirl flows of liquids or gases. A characteristic feature of such devices is the presence of large pressure losses required for the organization of flow swirling in channels of complex geometry. In the present paper, the manifestation of the swirl flow crisis is considered on the example of modeling the processes of hydrodynamics and heat exchange in the channels of an icebreaker steam generating installation.
- ПубликацияТолько метаданныеVortex Structurization of Swirl Flows in Energy Systems(2023) Mitrofanova, O. V.; Митрофанова, Ольга Викторовна