The extensive use of the pump as a turbine (PAT) for micro-hydropower applications has significant value from economic and technical viewpoints. However, unavailability characteristics curve relatively lower efficiency are two basic limitations when considering pumps power-generating applications. In this paper, performance PAT is analyzed using computational fluid dynamics (CFD) software calle...

The effect of blade spatial profiling with the help tangential lean Francis pump-turbine runner heads up to 200 m on flow structure and energy characteristics was numerically investigated. A part model Dniester pumped storage plant adopted as original version. Two new systems were designed, which differed from version by mutual position cross-sections in direction: positive negative lean, while...

Pressure fluctuations in the draft tube mainly arise from rotational motion of vortex rope. The formation and development rope are significantly influenced by cavitation. However, precise mechanism underlying progression cavitation its initial weak state to a more severe level remains unclear. objective this study is investigate pump-turbine operating under part load turbine conditions. Numeric...

Korto’s multidimensional method for vibro-acoustical diagnostics and monitoring of turbine cavitation is based on a high number spatially distributed sensors the signal data processing that systematically utilises three dimensions: spatial, temporal, operational. The delivers unbiased intensity rich diagnostical mechanisms. It applicable Kaplan, Francis, bulb, reversible pump turbines, as well ...