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Experimental Study of Transient Flow Regimes in a Model Hydroturbine Draft Tube. / Litvinov, Ivan; Suslov, Daniil; Gorelikov, Evgeny et al.

In: Energies, Vol. 14, No. 5, 1240, 01.03.2021.

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Litvinov I, Suslov D, Gorelikov E, Shtork S. Experimental Study of Transient Flow Regimes in a Model Hydroturbine Draft Tube. Energies. 2021 Mar 1;14(5):1240. doi: 10.3390/en14051240

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BibTeX

@article{8cba6863aa044c01881bf2eb075c71cc,
title = "Experimental Study of Transient Flow Regimes in a Model Hydroturbine Draft Tube",
abstract = "Swirling flow with the formation of a precessing vortex core (PVC) in the draft tube model of a hydroturbine was studied. Experiments were performed on an aerodynamic setup under transient operating conditions of the hydroturbine. The turbine operating conditions were varied by continuously changing the flow rate at a constant runner speed. The transition from the partial load regime, when a precessing vortex core is formed, to the best efficiency point without a core is considered. Applied to this task, a comparison of the windowed Fourier transform with wavelet analysis is given. The dependence of the PVC lifetime in the transient regime correlates with the transient time. It is shown that the velocity profiles and the spectrum of pressure pulsations in transient regimes change quasistatically between part-load operation and the best efficiency point of the turbine. The phase-averaged velocity distributions in the transient regimes show that a transient regime is a sequence of quasisteady regimes.",
keywords = "draft tube, precessing vortex core, transient regime, laser-Doppler anemometer, acoustic sensors, phase (conditional) averaging, Phase (conditional) averaging, Laser-Doppler anemometer, Draft tube, Acoustic sensors, Precessing vortex core, Transient regime",
author = "Ivan Litvinov and Daniil Suslov and Evgeny Gorelikov and Sergey Shtork",
note = "Funding Information: Funding: This investigation was supported by the Russian Foundation for Basic Research (Project No.: 18-08-01467, in the part of pressure measurements and analysis of phase-averaged velocity distributions). The design and installation of the experimental setup was carried out partly within the framework of a state contract with IT SB RAS. I. Litvinov acknowledges support of the grant of the President of the Russian Federation (Project No.: МК-1504.2021.4, in the part of pressure signal analysis). Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",
year = "2021",
month = mar,
day = "1",
doi = "10.3390/en14051240",
language = "English",
volume = "14",
journal = "Energies",
issn = "1996-1073",
publisher = "MDPI AG",
number = "5",

}

RIS

TY - JOUR

T1 - Experimental Study of Transient Flow Regimes in a Model Hydroturbine Draft Tube

AU - Litvinov, Ivan

AU - Suslov, Daniil

AU - Gorelikov, Evgeny

AU - Shtork, Sergey

N1 - Funding Information: Funding: This investigation was supported by the Russian Foundation for Basic Research (Project No.: 18-08-01467, in the part of pressure measurements and analysis of phase-averaged velocity distributions). The design and installation of the experimental setup was carried out partly within the framework of a state contract with IT SB RAS. I. Litvinov acknowledges support of the grant of the President of the Russian Federation (Project No.: МК-1504.2021.4, in the part of pressure signal analysis). Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/3/1

Y1 - 2021/3/1

N2 - Swirling flow with the formation of a precessing vortex core (PVC) in the draft tube model of a hydroturbine was studied. Experiments were performed on an aerodynamic setup under transient operating conditions of the hydroturbine. The turbine operating conditions were varied by continuously changing the flow rate at a constant runner speed. The transition from the partial load regime, when a precessing vortex core is formed, to the best efficiency point without a core is considered. Applied to this task, a comparison of the windowed Fourier transform with wavelet analysis is given. The dependence of the PVC lifetime in the transient regime correlates with the transient time. It is shown that the velocity profiles and the spectrum of pressure pulsations in transient regimes change quasistatically between part-load operation and the best efficiency point of the turbine. The phase-averaged velocity distributions in the transient regimes show that a transient regime is a sequence of quasisteady regimes.

AB - Swirling flow with the formation of a precessing vortex core (PVC) in the draft tube model of a hydroturbine was studied. Experiments were performed on an aerodynamic setup under transient operating conditions of the hydroturbine. The turbine operating conditions were varied by continuously changing the flow rate at a constant runner speed. The transition from the partial load regime, when a precessing vortex core is formed, to the best efficiency point without a core is considered. Applied to this task, a comparison of the windowed Fourier transform with wavelet analysis is given. The dependence of the PVC lifetime in the transient regime correlates with the transient time. It is shown that the velocity profiles and the spectrum of pressure pulsations in transient regimes change quasistatically between part-load operation and the best efficiency point of the turbine. The phase-averaged velocity distributions in the transient regimes show that a transient regime is a sequence of quasisteady regimes.

KW - draft tube

KW - precessing vortex core

KW - transient regime

KW - laser-Doppler anemometer

KW - acoustic sensors

KW - phase (conditional) averaging

KW - Phase (conditional) averaging

KW - Laser-Doppler anemometer

KW - Draft tube

KW - Acoustic sensors

KW - Precessing vortex core

KW - Transient regime

UR - http://www.scopus.com/inward/record.url?scp=85106308260&partnerID=8YFLogxK

U2 - 10.3390/en14051240

DO - 10.3390/en14051240

M3 - Article

VL - 14

JO - Energies

JF - Energies

SN - 1996-1073

IS - 5

M1 - 1240

ER -

ID: 28258593