Experimental study of pressure pulsations in the flow duct of a medium-size model hydroelectric generator with Francis turbine

Platonov, D. V.; Maslennikova, Aleksandra V.; Dekterev, Dmitry; Минаков, А. В.; Abramov, Artem

doi:10.1134/s086986431801002x

Cited by 5 publications

(4 citation statements)

References 11 publications

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“…With an increase in the opening angle of the guide vanes, water flow rate increases by about four times, while the efficiency increases from 40 to 60%, reaching a maximum when the guide vanes is opened by 80% [39].…”

Section: Resultsmentioning

confidence: 98%

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An Experimental Investigation of the Air Injection Effect on the Vortex Structure and Pulsation Characteristics in the Francis Turbine

Platonov¹,

Минаков²,

Dekterev³

et al. 2020

IJFMS

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The paper studies the pulsation characteristics of the flow when operating a medium-scale hydrodynamic test bench with a Francis turbine. The pressure fluctuations measurements and flow structure visualization were performed for all operation modes of the hydraulic unit. To control and suppress pulsations in the flow path, a series of experiments on air injection to the hydraulic unit were carried out. Comparison of pressure pulsations for single-phase and two-phase flow experimentation has shown that for modes with maximum loads, the pressure pulsations can be reduced almost to a half by means of air injection. The effect of air injection is also studied with respect to the efficiency of the hydraulic turbine.

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Section: Resultsmentioning

confidence: 98%

“…To begin with, data were obtained for the standard operating mode of the turbine (with single-phase flow). The results of this study are given in more detail in [39]. Here we will only describe the major points for a better understanding.…”

Section: Resultsmentioning

confidence: 99%

An Experimental Investigation of the Air Injection Effect on the Vortex Structure and Pulsation Characteristics in the Francis Turbine

Platonov¹,

Минаков²,

Dekterev³

et al. 2020

IJFMS

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show abstract

“…The pressure pulsation of flow via the duct of a medium-scale hydrodynamic bench with Francis turbine was analyzed [164]. The authors measured the characteristics of various pulsation regimes of the Francis turbine.…”

Section: Francis Turbine Modelingmentioning

confidence: 99%

“…Understanding the vibration effect on dam bodies has mainly been the focus of studies in the field of civil engineering [14,111,[119][120][121][122][136][137][138][139]141]. Mechanical engineering researchers have focused on the vibration effect on turbines [89,146,[160][161][162][163][164][165][166]175,[177][178][179]187].…”

Section: State-of-the-art Assessment and Evaluationmentioning

confidence: 99%

State-of-the Art-Powerhouse, Dam Structure, and Turbine Operation and Vibrations

Yaseen‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

Ameen

Aldlemy

et al. 2020

Sustainability

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Dam and powerhouse operation sustainability is a major concern from the hydraulic engineering perspective. Powerhouse operation is one of the main sources of vibrations in the dam structure and hydropower plant; thus, the evaluation of turbine performance at different water pressures is important for determining the sustainability of the dam body. Draft tube turbines run under high pressure and suffer from connection problems, such as vibrations and pressure fluctuation. Reducing the pressure fluctuation and minimizing the principal stress caused by undesired components of water in the draft tube turbine are ongoing problems that must be resolved. Here, we conducted a comprehensive review of studies performed on dams, powerhouses, and turbine vibration, focusing on the vibration of two turbine units: Kaplan and Francis turbine units. The survey covered several aspects of dam types (e.g., rock and concrete dams), powerhouse analysis, turbine vibrations, and the relationship between dam and hydropower plant sustainability and operation. The current review covers the related research on the fluid mechanism in turbine units of hydropower plants, providing a perspective on better control of vibrations. Thus, the risks and failures can be better managed and reduced, which in turn will reduce hydropower plant operation costs and simultaneously increase the economical sustainability. Several research gaps were found, and the literature was assessed to provide more insightful details on the studies surveyed. Numerous future research directions are recommended.

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Rotating vortex rope formation and mitigation in draft tube of hydro turbines – A review from experimental perspective

Kumar

Cervantes²,

Gandhi

2021

Renewable and Sustainable Energy Reviews

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Experimental study of pressure pulsations in the flow duct of a medium-size model hydroelectric generator with Francis turbine

Cited by 5 publications

References 11 publications

An Experimental Investigation of the Air Injection Effect on the Vortex Structure and Pulsation Characteristics in the Francis Turbine

An Experimental Investigation of the Air Injection Effect on the Vortex Structure and Pulsation Characteristics in the Francis Turbine

State-of-the Art-Powerhouse, Dam Structure, and Turbine Operation and Vibrations

Rotating vortex rope formation and mitigation in draft tube of hydro turbines – A review from experimental perspective

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