Abstract Design and performance analysis of hydraulic turbines are two very crucial aspects
of any hydro power project which ensure economical and efficient functioning of these …

Hydropower is a clean and renewable source of energy which is widely used to generate
electric power and stabilize the power grid. It can respond quickly to any change in demand …

Cavitating vortex rope at part load (PL) condition at lower values of the Thoma number (r)
induces severe pressure fluctuation and efficiency reduction in a Francis turbine, which …

Inter-blade vortex refers to a specific type vortex cavitation observed in Francis turbines
under partial loads and its adverse impact is widely recognized as a crucial factor that limits …

To provide the flexibility required by the evolving electrical grid, reversible pump-turbines
(RPT) nowadays are required to rapidly switch operating mode and to operate at deep …

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 …

Francis turbines are most widely used in hydropower due to their characteristics which
include a fast response and wide time-scale operation. The vortex rope inside Francis …

Vortex rope formation at part load (PL) with cavitation inception causes pressure fluctuations
inside the draft tube (DT) of a Francis turbine which may fail the turbine due to resonance …

Optimal operation of hydro turbine as one of the most important sources of renewable
energy is of great importance. In this article, using a combination of experimental and …

In this paper, the vortex characteristics in a low-head Francis turbine operating of adjustable-
speed at part load conditions are numerically investigated. First, the rules of fixed-speed and …