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 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 …

An experimental and theoretical investigation of the flow at the outlet of a Francis turbine
runner is carried out in order to elucidate the causes of a sudden drop in the draft tube …

The variable demand of the energy market requires that hydraulic turbines operate at
variable conditions, which includes regimes far from the best efficiency point. The vortex …

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 …

Abstract Development of rotating vortex rope (RVR) at part load (PL) operation is a source of
pressure fluctuations in draft tube and power swings, which may lead to runner failure under …

A novel machine learning based method is proposed to automatically identify steady
operations of hydropower plants (HPPs) in this study. The approach applies the Pruned …

Pressure fluctuations induced by a vortex rope are the major causes of hydraulic turbine
vibration in partial load operating conditions. Hence, an effective control strategy should be …

Three-dimensional unsteady turbulent flow through the entire flow passage of a model
Francis hydraulic turbine is simulated using the transition shear-stress transport turbulence …

Operating Francis turbines over extended range is often hindered by the flow instabilities
developed downstream the runner, in the draft tube cone. The unsteady pressure field …