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Sibirskii Zhurnal Industrial'noi Matematiki, 2023, Volume 26, Number 1, Pages 132–141
DOI: https://doi.org/10.33048/SIBJIM.2023.26.112 (Mi sjim1219) 		 
This article is cited in 1 scientific paper (total in 1 paper)

Numerical simulations of a swirling flow in a francis draft tube

E. V. Palkina, M. Yu. Hrebtovba, R. I. Mullyadzhanovab, I. V. Litvinovba, S. V. Alexeenkoab

a Kutateladze Institute of Thermophysics SB RAS, pr. Akad. Lavrentyeva 1, Novosibirsk 630090, Russia
b Novosibirsk State University, ul. Pirogova 1, Novosibirsk 630090, Russia
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DOI: https://doi.org/10.33048/SIBJIM.2023.26.112
Abstract: We study the flow in a model Francis-99 draft tube for partial load conditions using Large-eddy simulations. The swirl is produced by the runner rotating with a constant angular velocity. Within the validation step we compare results of eddy-resolving simulations with our Particle image velocimetry (PIV) and pressure measurements for three flow cases with different incoming flow rates. The time-averaged velocity fields agree well in experiments and simulations. To study the dynamical features we analyze spectral characteristics of the flow featuring a strong coherent component. This vortical structure corresponds to the precessing vortex core (PVC) changing the shape and amplitude with the increase in the bulk velocity.
Keywords: hydroturbine, draft tube, swirling flows, hydrodynamics instability, self-oscillation, precessing vortex core, turbulence, simulation, large-eddy simulation.
Funding agency Grant number
Russian Foundation for Basic Research 20-58-12012
Russian Science Foundation 21-79-10080
Ministry of Science and Higher Education of the Russian Federation СП-829.2021.1
Received: 18.08.2022
Revised: 18.08.2022
Accepted: 29.09.2022
English version:
Journal of Applied and Industrial Mathematics, 2023, Volume 17, Issue 1, Pages 156–162
DOI: https://doi.org/10.1134/S1990478923010179
Document Type: Article
UDC: 533.17:532.517.4:53.082.56:532.574.7
Language: Russian
Citation: E. V. Palkin, M. Yu. Hrebtov, R. I. Mullyadzhanov, I. V. Litvinov, S. V. Alexeenko, “Numerical simulations of a swirling flow in a francis draft tube”, Sib. Zh. Ind. Mat., 26:1 (2023), 132–141; J. Appl. Industr. Math., 17:1 (2023), 156–162
Citation in format AMSBIB
\Bibitem{PalHreMul23}
\by E.~V.~Palkin, M.~Yu.~Hrebtov, R.~I.~Mullyadzhanov, I.~V.~Litvinov, S.~V.~Alexeenko
\paper Numerical simulations of a swirling flow in a francis draft tube
\jour Sib. Zh. Ind. Mat.
\yr 2023
\vol 26
\issue 1
\pages 132--141
\mathnet{http://mi.mathnet.ru/sjim1219}
\crossref{https://doi.org/10.33048/SIBJIM.2023.26.112}
\transl
\jour J. Appl. Industr. Math.
\yr 2023
\vol 17
\issue 1
\pages 156--162
\crossref{https://doi.org/10.1134/S1990478923010179}
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