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, 2021
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 with the flexibility to operate over a wide range of time scales.
Sandeep Kumar, M. Cervantes, B. Gandhi
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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 with the flexibility to operate over a wide range of time scales.
Sandeep Kumar, M. Cervantes, B. Gandhi
semanticscholar +1 more source
Effect of water jet area on mitigation of vortex rope in a Francis turbine
The Physics of Fluids, 2023The rotating vortex rope (RVR) is normally formed at part load operating conditions, which develops flow instability in the draft tube (DT) cone of a Francis turbine. The detrimental effects of RVR reduce the life and performance of the turbine.
Sandeep Kumar, B. Gandhi
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Vortex rope interaction with radially protruded solid bodies in an axial turbine: a numerical study
IOP Conference Series: Earth and Environment, 2022Radially protruded solid rods and their interaction with the rotating vortex rope at part load condition are investigated numerically on an axial model turbine.
H. Holmström +2 more
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, 2020
Rotating Vortex Rope (RVR) has been a matter of focus for years due to the major effects on hydraulic turbine’s efficiency. The exact procedure of RVR formation is still vague.
N. Sotoudeh, R. Maddahian, M. Cervantes
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Rotating Vortex Rope (RVR) has been a matter of focus for years due to the major effects on hydraulic turbine’s efficiency. The exact procedure of RVR formation is still vague.
N. Sotoudeh, R. Maddahian, M. Cervantes
semanticscholar +1 more source
Volume 2: Fluid Applications and Systems; Fluid Measurement and Instrumentation, 2021
At off-design operations, flow instabilities such as vortex breakdown, reverse flows, and stagnant regions are observed in Francis turbines. The present work shows the numerical flow field investigations of a Francis turbine at two different part loads
Sandeep Kumar, S. Khullar, B. Gandhi
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At off-design operations, flow instabilities such as vortex breakdown, reverse flows, and stagnant regions are observed in Francis turbines. The present work shows the numerical flow field investigations of a Francis turbine at two different part loads
Sandeep Kumar, S. Khullar, B. Gandhi
semanticscholar +1 more source
Numerical Simulation of the Rotating Vortex Rope with Code_Saturne
International Conference on E-Business and E-Government, 2019The paper presents numerical simulations of the rotating vortex rope (RVR) inside a Francis turbine draft tube. The computational fluid dynamics (CFD) calculations were carried out using the Code_Saturne software. The geometry of the turbine was obtained
R. Mitruț +3 more
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Sustainable Energy Technologies and Assessments, 2022
The part load operation of a Francis turbine generally develops a rotating vortex rope (RVR) in the draft tube, generating flow instabilities and pressure pulsations.
Surinder Kumar, B. Gandhi
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The part load operation of a Francis turbine generally develops a rotating vortex rope (RVR) in the draft tube, generating flow instabilities and pressure pulsations.
Surinder Kumar, B. Gandhi
semanticscholar +1 more source
Numerical Analysis of Pulsating Water Jet Method for Mitigating the Vortex Rope
International Conference on E-Business and E-Government, 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
C. Tănasă +3 more
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The Physics of Fluids, 2023
The Francis turbine is a renowned reaction hydraulic turbine known for its remarkable ability to convert the energy of flowing water into mechanical energy.
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The Francis turbine is a renowned reaction hydraulic turbine known for its remarkable ability to convert the energy of flowing water into mechanical energy.
semanticscholar +1 more source
, 2020
Vortex ropes occurred in the draft tube when hydraulic turbines operating at off-design conditions, which can generate pressure fluctuations. Cavitation vortex rope is one of the most harmful factors to the safety of hydroturbines which may induce ...
A. Yu +4 more
semanticscholar +1 more source
Vortex ropes occurred in the draft tube when hydraulic turbines operating at off-design conditions, which can generate pressure fluctuations. Cavitation vortex rope is one of the most harmful factors to the safety of hydroturbines which may induce ...
A. Yu +4 more
semanticscholar +1 more source