Publications related to Analyse et prédiction de la baisse de rendement des turbines Francis par cavitation à bulles

Fiber pumps for wearable fluidic systems

Herbert Shea, Michael James Henry Smith, Vito Cacucciolo

Incorporating pressurized fluidic circuits into textiles can enable muscular support, thermoregulation, and haptic feedback in a convenient wearable form factor. However, conventional rigid pumps, with their associated noise and vibration, are unsuitable f ...

2023

Evaluation of a Dynamic Transfer Matrix for a Hydraulic Turbine

François Avellan, Andres Müller, Keita Yamamoto

It is well known that hydraulic machines experience various types of flow instabilities causing a negative influence on the system under off-design operations. The transfer matrix method correlating the flow properties in upstream and downstream of hydraul ...

2020

Bottom pressure characteristics in a stilling basin downstream of a stepped spillway for two different chute slopes

Anton Schleiss, Michael Pfister, José Pedro Gamito de Saldanha Calado Matos, Ivan Stojnic

In the last decades numerous stepped spillways were built, mostly on the downstream face of roller compacted concrete (RCC) dams. Stilling basins are often used as an energy dissipater. Although the hydraulics of stepped chutes was extensively investigated ...

The University of Queensland2020

On the hysteresis of cavitation incipience and desinence in hydraulic machines

Mohamed Farhat, Ali Amini, Martino Reclari

The omnipresent vortical structures in hydraulic machines are extremely prone to the occurrence of cavitation. It is well known that besides the flow parameters, the incipience, development, and disappearance of cavitation within a vortex is very sensitive ...

IOP PUBLISHING LTD2019

Procedure for predicting part load resonance in Francis turbine hydropower units based on swirl number and local cavitation coefficient similitude

François Avellan, Christophe Nicolet, Arthur Tristan Favrel, Christian Landry, Sébastien Alligné, Loïc Andolfatto

Francis turbines operating at part load conditions develop a cavitation precessing vortex known as a vortex rope in the draft tube cone below the runner outlet. At part load conditions, this vortex precession acts as an excitation source inducing pressure ...

ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD2019

On the physical mechanism of tip vortex cavitation hysteresis

Mohamed Farhat, Matthieu Dreyer, Ali Amini, Martino Reclari

Inception and desinence thresholds of tip vortex cavitation (TVC), generated by an elliptical NACA 16-020 hydrofoil, are measured at different flow conditions for various gas contents. It is observed that TVC often disappears at cavitation indices signific ...

SPRINGER2019

Intensifying cavitating flows in microfluidic devices with poly(vinyl alcohol) (PVA) microbubbles

Luis Guillermo Villanueva Torrijo, Morteza Ghorbani

Cavitation and the energy associated with the collapse of resulting cavitation bubbles constitute an important research subject. The collapse of the hydrodynamic cavitation bubbles at the outlet of the flow elements leads to a high energy release and gener ...

2018

Effect of spilling from adjacent orifices on the velocity field and pressures in front of needle stop-logs

Giovanni De Cesare, Azin Amini, Cédric Bron, Ivan Stojnic

In this study, the effect of spilling from neighboring sluice gates on stop-logs was experimentally investigated on a 1:65 physical scale model comprised of a double arch dam, a reservoir area, six spillway orifices and two stop-logs. Two types of measurem ...

2018

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Analyse et prédiction de la baisse de rendement des turbines Francis par cavitation à bulles

The influence of the gas on the dynamics of cavitation bubbles

Fiber pumps for wearable fluidic systems

Evaluation of a Dynamic Transfer Matrix for a Hydraulic Turbine

Physical Mechanism and Flow Control of Tip Vortex Cavitation

Bottom pressure characteristics in a stilling basin downstream of a stepped spillway for two different chute slopes

On the hysteresis of cavitation incipience and desinence in hydraulic machines

Procedure for predicting part load resonance in Francis turbine hydropower units based on swirl number and local cavitation coefficient similitude

On the physical mechanism of tip vortex cavitation hysteresis

Intensifying cavitating flows in microfluidic devices with poly(vinyl alcohol) (PVA) microbubbles

Effect of spilling from adjacent orifices on the velocity field and pressures in front of needle stop-logs

Graph Chatbot

Chat with Graph Search

Fiber pumps for wearable fluidic systems

Evaluation of a Dynamic Transfer Matrix for a Hydraulic Turbine

Physical Mechanism and Flow Control of Tip Vortex Cavitation

Bottom pressure characteristics in a stilling basin downstream of a stepped spillway for two different chute slopes

The influence of the gas on the dynamics of cavitation bubbles

On the hysteresis of cavitation incipience and desinence in hydraulic machines

Procedure for predicting part load resonance in Francis turbine hydropower units based on swirl number and local cavitation coefficient similitude

Effect of spilling from adjacent orifices on the velocity field and pressures in front of needle stop-logs

Intensifying cavitating flows in microfluidic devices with poly(vinyl alcohol) (PVA) microbubbles

On the physical mechanism of tip vortex cavitation hysteresis