In the plain river network area, the constructed axial-flow pumping station is used to
generate electricity by reversing as turbine when the upstream water is abundant, which can …

Operational flexibility of hydraulic turbines is impeded by the vortex breakdown
phenomenon. The phenomenon, a consequence of instability in vortical flows in general …

An experimental investigation of the cavitating turbulent flow in a simplified hydraulic turbine
was carried out to examine flow features in a wide range of speed and discharge conditions …

We report on the experimental study of a precessing vortex core (PVC) in an air model of a
Francis turbine. The focus is placed on the modal decomposition of the PVC that occurs in …

At part load conditions, Francis turbines are subject to the emergence of a hydrodynamic
instability in their draft tube, referred to as precessing vortex rope. It induces pressure …

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 …

Cavitation generally causes a decrease in efficiency and vibrations to a Kaplan turbine, but
effectively identifying cavitation state is quite difficult. In this paper, a comprehensive test …

As a limiting factor in power generation, especially in part-loads, turbulence is considered an
important phenomenon in hydropower plants. In this study, the pressure pulsation …

This paper presents an experimental study of a strongly swirling turbulent flow with the
formation of a precessing vortex core (PVC) that emerges at the outlet of a tangential swirler …

The flow in the draft tube of a Francis turbine is highly complex and unstable when the
turbine operates far from its design point. To extend the Francis turbine operation range to …