The paper reviews recent research and development activities in the field of hydropower
technology. It covers emerging and advanced technologies to mitigate flow instabilities …

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 …

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 grid-connected integrated system incorporating cascade hydropower, solar/photovoltaic,
and wind power requires a hydraulic turbine to operate frequently under off-design …

Cavitating vortex rope at part load (PL) condition at lower values of the Thoma number (r)
induces severe pressure fluctuation and efficiency reduction in a Francis turbine, which …

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 …

The runaway after pump-trip is a fast transient process, during which unit vibrations, water-
hammer fluctuations, pressure pulsation changes and flow pattern transitions happen …

Francis turbines are most widely used in hydropower due to their characteristics which
include a fast response and wide time-scale operation. The vortex rope inside Francis …

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 …

Vortex rope formation at part load (PL) with cavitation inception causes pressure fluctuations
inside the draft tube (DT) of a Francis turbine which may fail the turbine due to resonance …