Understanding and simulating the dynamic characteristics of hydro-turbine governor system is essential to guarantee safety hydro-power systems. This study proposes a modification method water head at draft tube inlet, which discretize introduce excitation term vortex rope. The proposed approach applied for modeling system. model (Model I) verified by means comparison with second II) without con...

Swirling flow with the formation of a precessing vortex core (PVC) in draft tube model hydroturbine was studied. Experiments were performed on an aerodynamic setup under transient operating conditions hydroturbine. The turbine varied by continuously changing rate at constant runner speed. transition from partial load regime, when is formed, to best efficiency point without considered. Applied t...