[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 …

Review of hydrodynamics instabilities in Francis turbine during off-design and transient operations

R Goyal, BK Gandhi - Renewable energy, 2018 - Elsevier
Electricity generation from solar and wind has raised a significant concern about the stability
of grid networks. Hydroelectricity plays an important role to balance the stability of grid …

Numerical simulation and experimental study on the comparison of the hydraulic characteristics of an axial-flow pump and a full tubular pump

L Shi, W Zhang, H Jiao, F Tang, L Wang, D Sun… - Renewable Energy, 2020 - Elsevier
An axial-flow pump impeller is designed on the basis of plane cascade theory, which is
based on surface element method, to study the influence of impeller rotor on the hydraulic …

Unstable pressure fluctuations in the vaneless space of high-head reversible pump-turbines–a systematic review

BR Rode, A Kumar - Journal of Energy Storage, 2023 - Elsevier
In the high-head reversible pump-turbines, the most unfavourable hydraulic instability is the
unstable pressure fluctuations in the vaneless space caused by interactions between the …

Numerical simulation and experimental study of transient characteristics in an axial flow pump during start-up

S Fu, Y Zheng, K Kan, H Chen, X Han, X Liang, H Liu… - Renewable Energy, 2020 - Elsevier
In order to explore the impact load and instantaneous fluid pressure of transient flow on
pump station system under the nonregulative operating conditions, the transient …

Fluid-structure interactions in Francis turbines: A perspective review

C Trivedi, MJ Cervantes - Renewable and Sustainable Energy Reviews, 2017 - Elsevier
Competitive electricity prices and reduced profit margins have forced hydraulic turbines to
operate under critical conditions. The demand for extended operating ranges and the high …

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 …

Investigation methods for analysis of transient phenomena concerning design and operation of hydraulic-machine systems—A review

D Li, X Fu, Z Zuo, H Wang, Z Li, S Liu, X Wei - Renewable and Sustainable …, 2019 - Elsevier
Over the past decade, the use of conventional one-dimensional numerical-simulation
methods has been demonstrated to be inadequate in terms of their usefulness in …

Evolution mechanism of a prototype pump turbine after pump power-off

D Li, X Fu, H Wang, R Zhao, X Wei - Physics of Fluids, 2021 - pubs.aip.org
This study aimed to analyze the time–frequency characteristics of pressure fluctuations and
reveal their underlying flow mechanisms during the unavoidable guide vane closing process …

Analysis of unsteady internal flow characteristics in axial pump with varying number of blades using computational modelling and vibration techniques

AR Al-Obaidi, J Alhamid - Flow Measurement and Instrumentation, 2024 - Elsevier
Axial pumps were extensively applied in many varying applications because of their large
flow and low head. In this research investigation, the comparative analysis of the findings …