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Numerical Analysis of Pulsating Water Jet Method for Mitigating the Vortex Rope
2019 International Conference on ENERGY and ENVIRONMENT (CIEM), 2019Hydraulic machines, that operate at part load can suffer severe pressure fluctuations. These fluctuations vary in frequency and amplitude depending on the operating point. The cause of these changes in fluctuations, such as a 70% flow rate regime, is the appearance of the rotating vortex (vortex rope). Removing the rotating vortex is a problem that has
Constantin Tanasa +3 more
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Measurement of the Self-Oscillating Vortex Rope Dynamics for Hydroacoustic Stability Analysis
Journal of Fluids Engineering, 2015Flow instabilities in hydraulic machines often feature oscillating cavitation volumes, which locally introduce compliance and mass flow gain effects. These unsteady characteristics play a crucial role in one-dimensional stability models and can be determined through the definition of transfer functions for the state variables, where the cavitation ...
Andres Müller +5 more
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Flow-Feedback Method for Mitigating the Vortex Rope in Decelerated Swirling Flows
Journal of Fluids Engineering, 2013When reaction hydraulic turbines are operated far from the design operating regime, particularly at partial discharge, swirling flow instability is developed downstream of the runner, in the discharge cone, with a precessing helical vortex and its associated severe pressure fluctuations. Bosioc et al.
Constantin Tănasă +3 more
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Identification on Vortex Rope in Francis Turbine Draft Tube Based on Convkurgram
IEEE Transactions on Instrumentation and Measurement, 2022Huan Wang +7 more
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Study on Suppression of Cavitating Vortex Rope on Pump-Turbines by J-Groove
Applied Energy, 2023Shujiao Pang +3 more
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Recognition of the developing vortex rope in Francis turbine draft tube based on PSO-CS2
Renewable Energy, 2023Wenfeng Li, Yaochun Hou, Kelin Wu
exaly
Runner cone optimization to reduce vortex rope-induced pressure fluctuations in a Francis turbine
Science China Technological Sciences, 2021Deyou Li, Hongjie Wang, Xianzhu Wei
exaly
End of the rope for vortex pressure pulsations
International Journal of Multiphase Flow, 1997openaire +1 more source
Entropy production analysis for vortex rope of a Francis turbine using hybrid RANS/LES method
International Communications in Heat and Mass Transfer, 2021Zhi-Feng Yu, Wen-Quan Wang
exaly