[HTML][HTML] Analysis of emerging technologies in the hydropower sector

I Kougias, G Aggidis, F Avellan, S Deniz… - … and Sustainable Energy …, 2019‏ - Elsevier
The paper reviews recent research and development activities in the field of hydropower
technology. It covers emerging and advanced technologies to mitigate flow instabilities …

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

S Kumar, MJ Cervantes, BK Gandhi - Renewable and Sustainable Energy …, 2021‏ - Elsevier
Hydropower is a clean and renewable source of energy which is widely used to generate
electric power and stabilize the power grid. It can respond quickly to any change in demand …

Effects of vortex rope formation in draft tube of reversible pump-turbine–A review

BR Rode, A Kumar - Journal of Energy Storage, 2024‏ - Elsevier
Reversible pump-turbines need to operate often at off-design operating conditions to
stabilize the electric grid. These operating conditions cause hydraulic instabilities due to the …

A new draft tube shape optimisation methodology of introducing inclined conical diffuser in hydraulic turbine

X Zhou, H Wu, L Cheng, Q Huang, C Shi - Energy, 2023‏ - Elsevier
A grid-connected integrated system incorporating cascade hydropower, solar/photovoltaic,
and wind power requires a hydraulic turbine to operate frequently under off-design …

Optimization of axial water injection to mitigate the Rotating Vortex Rope in a Francis turbine

HJ Juposhti, R Maddahian, MJ Cervantes - Renewable Energy, 2021‏ - Elsevier
Abstract Rotating Vortex Rope (RVR) resulting from flow instabilities inside draft tube affects
the hydraulic turbine's efficiency and wear. Among the passive and active RVR mitigation …

Investigation of rotating vortex rope formation during load variation in a Francis turbine draft tube

N Sotoudeh, R Maddahian, MJ Cervantes - Renewable energy, 2020‏ - Elsevier
Abstract Rotating Vortex Rope (RVR) has been a matter of focus for years due to the major
effects on hydraulic turbine's efficiency. The exact procedure of RVR formation is still vague …

Hydropower: A renewable energy resource for sustainability in terms of climate change and environmental protection

R Siri, SR Mondal, S Das - Alternative Energy Resources: The Way to a …, 2020‏ - Springer
Hydropower refers to energy conversion from flowing water into electricity. Due to water
recycling by the Sun, hydropower is widely accepted as a form of renewable energy. A …

[HTML][HTML] Experimental investigation of an adjustable guide vane system in a Francis turbine draft tube at part load operation

J Joy, M Raisee, MJ Cervantes - Renewable Energy, 2023‏ - Elsevier
Hydraulic turbines are increasingly used to regulate the electrical grid. They thus have to
operate more often at off-design conditions where instabilities may develop leading to large …

Unsteady regimes and pressure pulsations in draft tube of a model hydro turbine in a range of off-design conditions

I Litvinov, S Shtork, E Gorelikov, A Mitryakov… - … Thermal and Fluid …, 2018‏ - Elsevier
We report on experimental study of flow and pressure pulsations in draft-tube of a laboratory
air model of Francis-99 hydro-turbine operating over a broad range of regimes employing a …

Experimental and numerical simulation research on flow characteristics of model pump-turbine in four-quadrant operating quadrants

L Xu, D Liu, Z Li, X Zhao, X Liu - Journal of Energy Storage, 2022‏ - Elsevier
Owing to the need for power grid peak regulation and frequency regulation, the pumped
storage unit has to undergo frequent working condition conversion, and the pump turbine …