Operations – Poster Presentations
CLEAN CURRENTS 2026
Time: 2:30 PM - 3:30 PM
Day: 9/23/2026
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Details about each presentation and the speakers are below:
In this session:
Mitigating Fatigue Risks in Hydro-Turbines through Rotor-Stator Interaction (RSI) Monitoring
Mitigating Fatigue Risks in Hydro-Turbines through Rotor-Stator Interaction (RSI) Monitoring (VESKI / Dewesoft)
Presented by Ozren Oreskovic, VESKI, a member of Dewesoft
Presented by Ozren Oreskovic, VESKI, a member of Dewesoft
In hydrogenerator turbines, the passing interactions between the turbine runner (rotating blades) and the guide vanes (stationary blades) generate pressure pulsations due to unsteady flow fields and wake effects, a phenomenon known as rotor-stator interaction (RSI). These pressure fluctuations, if severe, can lead to excessive vibrations, noise, and even fatigue failures in the turbine components, which can significantly influence turbine performance, structural integrity, and maintenance schedules.
RSI often induces increased vibrations and pressure fluctuations at specific frequencies, usually related to blade-passing frequencies. Repeated stress and resonant effects on these frequencies can lead to cracks in the runner blades, runner rings, and labyrinth seals, and can affect other machine parts.
Deploying an online condition monitoring system that simultaneously tracks critical parameters is essential for mitigating the impact of severe rotor-stator interaction (RSI) induced dynamics. An effective system integrates multiple diagnostic techniques, including vibration monitoring, strain gauge measurements, and dynamic pressure sensing, to accurately detect and analyze pressure pulsation-induced vibrations.
