Abstract Rotating Vortex Rope (RVR) resulting from flow instabilities inside draft tube affects
the hydraulic turbine's efficiency and wear. Among the passive and active RVR mitigation …

In hydro turbines, the draft tube vortex rope is one of the most crucial impact factors causing
pressure pulsation and vibration. It is affected by operating conditions due to differences in …

Due to the increasing global power demand, hydropower plants face the challenge of
operating at flow rates far from their best efficiency point to comply with the electrical grid …

Cavitation is a common flow phenomenon observed in hydraulic turbines that can cause
significant implications in the life cycle of the machine. Associated noise, vibration, and …

Computational fluid dynamics simulations were conducted to study the performance of a
Francis turbine operating at various flow rates spanning from ultra-low to excessive load …

High-fidelity large eddy simulations (LES) were conducted to characterize the spatial and
temporal structure of turbulent flows in an industrial-sized Francis turbine. The unit operated …