Вісники НТУ "ХПІ"

Постійне посилання на розділhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/2494


З 1961 р. у ХПІ видається збірник наукових праць "Вісник Харківського політехнічного інституту".
Згідно до наказу ректора № 158-1 від 07.05.2001 року "Про упорядкування видання вісника НТУ "ХПІ", збірник був перейменований у Вісник Національного Технічного Університету "ХПІ".
Вісник Національного технічного університету "Харківський політехнічний інститут" включено до переліку спеціалізованих видань ВАК України і виходить по серіях, що відображають наукові напрямки діяльності вчених університету та потенційних здобувачів вчених ступенів та звань.
Зараз налічується 30 діючих тематичних редколегій. Вісник друкує статті як співробітників НТУ "ХПІ", так і статті авторів інших наукових закладів України та зарубіжжя, які представлені у даному розділі.

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Фільтри

2018 - 20192

Налаштування

Автор: search.filters.author.Mironov, Konstantin AnatolievichКлючові слова: search.filters.subject.draft tube

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Зараз показуємо 1 - 2 з 2
  • Ескіз
    Документ
    Research of fluid flow in two-dimensional and three-dimensional formulation in the flow part of a high-pressure francis turbine
    (Національний технічний університет "Харківський політехнічний інститут", 2019) Mironov, Konstantin Anatolievich; Oleksenko, Yuliia Yuriivna
    The paper presents some results of a computational study of the spatial flow of a viscous fluid in a high-pressure Francis turbine Fr500 (in the optimal mode). To improve the energy performance at the preliminary design stage of the turbine, numerical flow simulations should be carried out. The difficulty of solving the problem posed is due both to the complex spatial geometry of the blade system of the runner and the varying degree of influence of the working bodies on the formation of energy characteristics. This CFD approach reduces costs and time in comparison with the experimental approach and makes it possible to improve and analyze turbine performance and its design before the model is manufactured. The computational complex of programs provides an opportunity to see the picture of pressure distribution, the field of velocity vectors and the movement of fluid particles for substantiation and analysis of results. Numerical modeling of the spatial flow in the flow part of the turbine was carried out to determine changes in the energy characteristics, therefore, the k - ε turbulence model was chosen, this model is the most successful model of first-level turbulence of the circuit. The results of the computational study confirm that the hydraulic efficiency of a hydraulic turbine largely depends on the losses in the guide vane and the runner, which means it is these elements that should be given the most attention, their design and coordination of the flow in them. Analysis of the energy loss in the flow part of the Francis turbine was carried out using programs for calculating fluid flow in two-dimensional and three-dimensional formulation. The obtained calculated data correspond to the previously known experimental recommendations for high-pressure Francis turbine. The issues of increasing the energy performance of a projected high-pressure Francis turbine were considered.
  • Ескіз
    Документ
    Study of the spatial flow in the flow part of the high-pressure francis turbine
    (НТУ "ХПІ", 2018) Mironov, Konstantin Anatolievich; Oleksenko, Yuliia Yuriivna; Mironov, Vadim Konstantinovich
    The paper presents some results of a computational study of the spatial turbulent flow of a viscous fluid in the flow part of the high-pressure Francis turbine Fr500, made using the CFX-TASCflow application program package. To improve the energy performance at the preliminary design stage of the turbine, numerical flow simulations should be carried out. This CFD approach reduces costs and time in comparison with the experimental approach and makes it possible to improve and analyze turbine performance and its design before the model is manufactured. The computational complex of programs provides an opportunity to see the picture of pressure distribution, the field of velocity vectors and the movement of fluid particles for substantiation and analysis of results. Numerical modeling of the spatial flow in the flow part of the turbine was carried out to determine changes in the energy characteristics, therefore, the k-ε turbulence model was chosen. As a result of the calculation, the distribution of speeds and pressures in the various elements of the hydraulic turbine was determined at different openings of the guide vane. The analysis of energy losses in the flow part of a Francis turbine: a spiral case, a stator withflat rings, a guide vane, a runner and a draft tube on the optimal operating mode of the hydraulic turbine, as well as an analysis of the effect of opening the guide vane on changes in energy losses in various elements of the flow parts. The results of the computational study confirm that the hydraulic efficiency of a hydraulic turbine largely depends on the losses in the guide vane and the runner, which means it is these elements that should be given the most attention, their design and coordination of the flow in them. The issue of increasing the energy performance of the flow parts of a high-pressure Francis turbine was also considered.