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Large Eddy Simulation of the transient cavitating vortical flow in the wake of a hydrofoil
(2021)
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Text en actes de congrés.
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The Zwart mixture cavitation model and the Large Eddy Simulation (LES) turbulence model have been combined to simulate the transient cavitating flow in the wake of a hydrofoil. The hydrofoil is a 2D NACA0009 with a truncated ...
Numerical investigation of the effects of hydrofoil vibrations on the unsteady behavior of cavitation
(Institute of Physics (IOP), 2021)
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Text en actes de congrés.
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In order to better understand the fluid-structure interaction (FSI) in hydraulic machines, this study aims to numerically investigate the flow around an oscillating hydrofoil with special attention on the effect of ...
Assessment of turbulence models for the prediction of Bénard- Von Kármán vortex shedding behind a truncated hydrofoil in cavitation conditions
(Institute of Physics (IOP), 2021)
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Text en actes de congrés.
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The transient cavitating flow in the wake of a hydrofoil at zero incidence angle has been simulated using a homogeneous mixture cavitation mass transfer model combined with both Reynolds Average Navier-Stokes (RANS) and ...
Mass transfer rate effects on the cavitating vortex shedding flow around a circular cylinder at low Reynolds number
(2021)
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Text en actes de congrés.
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Cavitating vortex shedding is a flow phenomenon commonly encountered behind bluff bodies in hydraulic machinery and systems and the generated vapor bubbles significantly change the dynamic behavior of the vortices. In ...
Large-eddy simulation of cavitating tip leakage vortex structures and dynamics around a NACA0009 hydrofoil
(MDPI, 2021-11-01)
Article.
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Article.
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The tip leakage vortex (TLV) has aroused great concern for turbomachine performance, stability and noise generation as well as cavitation erosion. To better understand structures and dynamics of the TLV, large-eddy simulation ...
Prediction of cavitation erosion with different erosion risk indicators
(2022-02)
Article.
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Article.
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This present work devoted to simulate the unsteady cavitating flow around a hydrofoil and assess its erosion power predicted by different erosion risk indicators. For that, the behavior of unsteady cloud cavity is numerically ...
Experimental and numerical modal analysis of a reduced scale Kaplan turbine model
(2021)
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Text en actes de congrés.
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This paper presents an experimental modal test of a Kaplan turbine model and provides the corresponding analysis of the results. The modal test, which included both the runner and the shaft line, was performed using an ...
Numerical assessment of parameters influencing the modal response of a Kaplan turbine model
(Institute of Physics (IOP), 2021)
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Text en actes de congrés.
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The present study intends to investigate numerically the impact of: i) the fluid added mass, ii) the turbine rotational speed and iii) the variation of the runner blade bearing stiffness due to the turbine water head on ...
Understanding the influence of wake cavitation on the dynamic response of hydraulic profiles under lock-in conditions
(2021-09-22)
Article.
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Article.
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To accelerate the integration of fluctuating renewable energy technologies in the power systems, it is necessary to increase the flexibility of hydropower by operating turbines at off-design conditions. Unfortunately, this ...
On the rotating vortex rope and its induced structural response in a Kaplan turbine model
(2022-08-29)
Article.
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Article.
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The rotating vortex rope, which can be decomposed in the rotating and the plunging modes, is the origin of pressure fluctuations in the draft tube cone when hydraulic turbines operate at part load, compromising the structural ...