Reversible pump turbine plays an important role in pumped storage technology. Its pressure
pulsation performance also directly affects the stability and efficiency of unit operation. In this …

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 …

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 …

This paper presents the results of a parametric experimental study of free swirling flow at the
exit of a flat-vane axial swirler. A total of 16 data sets were acquired by combining four …

When a hydro turbine deviates from the best efficiency conditions and carries the partial
load, the helical vortex rope appears in the center of the draft tube. It will cause the unstable …

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 …

Operating hydraulic turbines under part-or over-load conditions leads to the development of
the precessing vortex rope downstream of the turbine runner. In a regime close to the best …

We report on the examination of several approaches to simulate computationally the
unstable regime of a model Kaplan turbine operating at off-design load. Numerical …