Numerical Simulation of a Swirling Flow in a Francis Draft Tube

E. V. Palkin; M. Yu Hrebtov; R. I. Mullyadzhanov; I. V. Litvinov; S. V. Alekseenko

doi:10.1134/S1990478923010179

Numerical Simulation of a Swirling Flow in a Francis Draft Tube

E. V. Palkin, M. Yu Hrebtov, R. I. Mullyadzhanov, I. V. Litvinov, S. V. Alekseenko

Research output: Contribution to journal › Article › peer-review

Abstract

Abstract: We study the flow in a model Francis-99 draft tube for partial load conditions usingLarge-eddy simulation. The swirl is produced by the runner rotating with a constant angularvelocity. Within the validation step, we compare results of eddy-resolving simulations with ourParticle image velocimetry (PIV) and pressure measurements for three flow cases with differentincoming flow rates. The time-averaged velocity fields agree well in experiments and simulation.To study the dynamical features, we analyze spectral characteristics of the flow featuring a strongcoherent component. This vortical structure corresponds to the precessing vortex core (PVC)changing the shape and amplitude with the increase in the bulk velocity.

Original language	English
Pages (from-to)	156-162
Number of pages	7
Journal	Journal of Applied and Industrial Mathematics
Volume	17
Issue number	1
DOIs	https://doi.org/10.1134/S1990478923010179
State	Published - Mar 2023
Externally published	Yes

Keywords

draft tube
hydrodynamic instability
hydroturbine
large-eddy simulation
precessing vortex core
self-oscillation
simulation
swirling flow
turbulence

All Science Journal Classification (ASJC) codes

Industrial and Manufacturing Engineering
Applied Mathematics

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1134/S1990478923010179

Cite this

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title = "Numerical Simulation of a Swirling Flow in a Francis Draft Tube",

abstract = "Abstract: We study the flow in a model Francis-99 draft tube for partial load conditions usingLarge-eddy simulation. The swirl is produced by the runner rotating with a constant angularvelocity. Within the validation step, we compare results of eddy-resolving simulations with ourParticle image velocimetry (PIV) and pressure measurements for three flow cases with differentincoming flow rates. The time-averaged velocity fields agree well in experiments and simulation.To study the dynamical features, we analyze spectral characteristics of the flow featuring a strongcoherent component. This vortical structure corresponds to the precessing vortex core (PVC)changing the shape and amplitude with the increase in the bulk velocity.",

keywords = "draft tube, hydrodynamic instability, hydroturbine, large-eddy simulation, precessing vortex core, self-oscillation, simulation, swirling flow, turbulence",

author = "Palkin, {E. V.} and Hrebtov, {M. Yu} and Mullyadzhanov, {R. I.} and Litvinov, {I. V.} and Alekseenko, {S. V.}",

note = "Publisher Copyright: {\textcopyright} 2023, Pleiades Publishing, Ltd.",

year = "2023",

month = mar,

doi = "10.1134/S1990478923010179",

language = "الإنجليزيّة",

volume = "17",

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journal = "Journal of Applied and Industrial Mathematics",

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T1 - Numerical Simulation of a Swirling Flow in a Francis Draft Tube

AU - Palkin, E. V.

AU - Hrebtov, M. Yu

AU - Mullyadzhanov, R. I.

AU - Litvinov, I. V.

AU - Alekseenko, S. V.

PY - 2023/3

Y1 - 2023/3

N2 - Abstract: We study the flow in a model Francis-99 draft tube for partial load conditions usingLarge-eddy simulation. The swirl is produced by the runner rotating with a constant angularvelocity. Within the validation step, we compare results of eddy-resolving simulations with ourParticle image velocimetry (PIV) and pressure measurements for three flow cases with differentincoming flow rates. The time-averaged velocity fields agree well in experiments and simulation.To study the dynamical features, we analyze spectral characteristics of the flow featuring a strongcoherent component. This vortical structure corresponds to the precessing vortex core (PVC)changing the shape and amplitude with the increase in the bulk velocity.

AB - Abstract: We study the flow in a model Francis-99 draft tube for partial load conditions usingLarge-eddy simulation. The swirl is produced by the runner rotating with a constant angularvelocity. Within the validation step, we compare results of eddy-resolving simulations with ourParticle image velocimetry (PIV) and pressure measurements for three flow cases with differentincoming flow rates. The time-averaged velocity fields agree well in experiments and simulation.To study the dynamical features, we analyze spectral characteristics of the flow featuring a strongcoherent component. This vortical structure corresponds to the precessing vortex core (PVC)changing the shape and amplitude with the increase in the bulk velocity.

KW - draft tube

KW - hydrodynamic instability

KW - hydroturbine

KW - large-eddy simulation

KW - precessing vortex core

KW - self-oscillation

KW - simulation

KW - swirling flow

KW - turbulence

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U2 - 10.1134/S1990478923010179

DO - 10.1134/S1990478923010179

M3 - مقالة

SN - 1990-4789

VL - 17

SP - 156

EP - 162

JO - Journal of Applied and Industrial Mathematics

JF - Journal of Applied and Industrial Mathematics

IS - 1

ER -

Numerical Simulation of a Swirling Flow in a Francis Draft Tube

Abstract

Keywords

All Science Journal Classification (ASJC) codes

UN SDGs

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