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 …

How to extract the running feature information and realize multi-type faults diagnosis is the
key to carry out intelligent operation and maintenance of energy conversion machinery. The …

Reversible pump-turbines are the core component in most pumped storage power stations
worldwide; however, their performances are worst affected by the unstable hydraulic …

When a pump turbine operates under off-design conditions, a spiral cavitation vortex rope
(VR) forms in the draft tube, resulting in decreased unit efficiency, vibration, and noise …

In order to meet the regulation needs of power system, the pump-turbine is prone to operate
in the S-shaped region during frequent start-up, leading to unit vibration and grid connection …

This study aims to develop a rapid optimization design method for the centrifugal pump with
high efficiency and low noise. The improved delayed detached eddy simulation and Powell's …

Efficiently extracting information from the massive data that characterize the abnormal
condition is an important topic for pumped storage units (PSUs) operation and maintenance …

During the load rejection condition of the pump-turbines, the S-shaped characteristic would
lead to intense pressure pulsations, thus threatening the safe operation of the pumped …

With the rapid development of high-head, large-capacity and high-speed pump-turbines, the
compressed vaneless space and frequent operating condition transitions exacerbate the …

The unstable flow in the S characteristic zone of the pump turbine causes nonlinear
fluctuations in parameters such as discharge and pressure, accompanied by increased …