A pumped storage stations model was set up and introduced in the previous paper. In the model station, the S-shaped characteristic curves was measured at the load rejection condition with the guide vanes stalling. Load rejection tests where guide-vane closed linearly were performed to validate the effect of the S-shaped characteristics on hydraulic transients. Load rejection experiments with di...

Fluid-induced rotordynamic forces produced by the uid in an annular seal or in the leakage passage surrounding the shroud of a pump or turbine, are known to contribute substantially to the potential excitation forces acting on the rotor. In this paper we explore some of the important features of the equations governing bulkow models of these ows. This in turn suggests methods which might be use...

The internal flow problem of a reversible pump turbine restricts its safe and stable operation. Among them, the influence guide vane on field is very crucial. flow–head relationship great significance in performance stability unit. In this study, characteristics under different rates were analyzed for opening angles. By comparing results model test computational fluid dynamics simulation, it wa...

The clearance flow patterns and pressure distribution determine the axial hydraulic thrust of a pump turbine, which has substantial impact on unit imbalance. However, due to tiny size complex shape channel, there is no detailed description characteristics. In this study, we conducted model test with particle image velocimetry (PIV) measurements CFD simulation rotating disk that was simplified p...

Pumped Hydropower Storage (PHS) is the maturest and most economically viable technology for storing energy regulating electrical grid on a large scale. Due to growing amount of intermittent renewable sources, necessity maintaining stability increases. Most PHS facilities today require geographical topology with differences in elevation. The ALPHEUS H2020 EU project has aim develop flat topologi...