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