The paper critically reviews the verification and validation (VV) techniques applied to
investigate hydraulic turbines. Although there are well-established standards such as AIAA …

Dynamic stability of the high-head Francis turbines is one of the challenging problems.
Unsteady rotor–stator interaction (RSI) develops dynamic stresses and leads to crack in the …

This work investigates the unsteady pressure fluctuations and inception of vortical flow in a
hydraulic turbine during speed-no-load conditions. At speed-no-load (SNL), the available …

This paper presents a numerical methodology to study Francis turbines at no-load condition,
an important operating condition regarding static and dynamic stresses. The proposed …

The present study investigates a transient condition, ie load variation from the best efficiency
point to the part load, of a Francis turbine. A complete turbine is considered for the study …

To enhance the sustainability of water supply systems, the development of new technologies
for micro scale hydropower remains an active field of research. The present paper deals with …

If a turbine loses its electrical load, it will rotate freely and increase speed, eventually
achieving that rotational speed which produces zero net torque. This is known as a runaway …

In recent years, several studies have focused on improving hydroelectric turbine designs in
order to decrease the negative influence of off-design conditions and transient processes …

Περίληψη Η ταχεία και εκτενής ενσωμάτωση της ηλεκτρικής ενέργειας από ανανεώσιμες
πηγές στο ηλεκτρικό δίκτυο είναι απαραίτητη για την επίτευξη των ενεργειακών στόχων της …

This paper presents an automated tool chain for simulating Francis turbine behavior during
the transient processes induced by a load rejection event. The proposed methodology …