Publications associées à Pompe centrifuge

Experimental Investigation of Pressure Fluctuations in a High-Energy Centrifugal Pump Stage at Off-Design Conditions

François Avellan, Mohamed Farhat, Stefan Berten, Philippe Dupont

In centrifugal pumps, the interaction between the rotating impeller blades and the stationary diffuser vanes generates specific pressure fluctuation patterns. At off design operation, high incidence and large local pressure gradients can lead to flow separ ...

Institution of Mechanical Engineers2014

Non-intrusive detection of rotating stall in pump-turbines

Mohamed Farhat, Vlad Hasmatuchi, Steven Roth, Francisco Botero

When operated far from their optimum conditions, pump-turbines may exhibit strong hydrodynamic instabilities, often called rotating stall, which lead to substantial increase of vibration and risk of mechanical failure. In the present study, we have investi ...

Elsevier2014

Optimization of a Shared Tailrace Channel of Two Pumped-Storage Plants by Physical and Numerical Modeling

Giovanni De Cesare, Martin Peter Bieri, Stéphane Christian Olivier Terrier, Sylvain Candolfi

Pump and turbine operations lead to head losses in the tailrace channel. Pumping discharge may be limited due to potential air entrainment into the pump shaft when the downstream reservoir is at its lowest level and the head losses are too high. Regarding ...

2014

Surge Wave Propagation in a Common Tailrace Channel for Two Large Pumped-Storage Plants

Anton Schleiss, Giovanni De Cesare, Martin Peter Bieri, Stéphane Christian Olivier Terrier

Sudden starting and stopping of turbines and pumps lead to highly unsteady flow in tailrace channels of hydropower plants (HPP). Submergence of Pelton turbines and air entrainment in pumps due to surge waves must be avoided by technical measures. The exist ...

Asce-Amer Soc Civil Engineers2014

Coherent terabit communications with microresonator Kerr frequency combs

Tobias Kippenberg, Victor Brasch, Tobias Herr, Jingshi Li

Optical frequency combs have the potential to revolutionize terabit communications(1). The generation of Kerr combs in nonlinear microresonators(2) is particularly promising(3), enabling line spacings of tens of gigahertz. However, such combs may exhibit s ...

Nature Publishing Group2014

Impact Assessment of Pumping Parameters on Groundwater Bacterial Communities

Christof Holliger, Pierre Rossi, Noam Shani, Guillaume Laulan

Groundwater microbial community samples are traditionally collected using pumping techniques optimized for groundwater chemistry assessment, although the impact of groundwater pumping parameters on apparent bacterial community structures (BCSs) is not real ...

Wiley-Blackwell2013

Sensing systems and methods for distributed Brillouin sensing

Luc Thévenaz, Sang Hoon Chin

According to the present invention there is provided methods of performing a distributing sensing measurement, comprising the steps of, modulating the frequency of one or more light signals output from one or more light sources, using one or more multi-lev ...

World Intellectual Property Organization2013

Flow and waves in a common tailrace channel of two pump-storage plants - physical and numerical simulation

Giovanni De Cesare, Martin Peter Bieri, Stéphane Christian Olivier Terrier, Sylvain Candolfi

2012

Experimental study of the pressure fluctuations in a pump turbine at large partial flow conditions

Hongjuan Ran, Yao Zhang, Xin Wang

Frequent shifts of output and operating mode require a pump turbine with excellent stability. Current researches show that large partial flow conditions in pump mode experience positive-slope phenomena with a large head drop. The pressure fluctuation at th ...

Editorial Office Chinese Journal Mechanical Engineering2012

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Pompe centrifuge

Experimental Investigation of Pressure Fluctuations in a High-Energy Centrifugal Pump Stage at Off-Design Conditions

Non-intrusive detection of rotating stall in pump-turbines

Optimization of a Shared Tailrace Channel of Two Pumped-Storage Plants by Physical and Numerical Modeling

Surge Wave Propagation in a Common Tailrace Channel for Two Large Pumped-Storage Plants

Coherent terabit communications with microresonator Kerr frequency combs

Impact Assessment of Pumping Parameters on Groundwater Bacterial Communities

Sensing systems and methods for distributed Brillouin sensing

Flow and waves in a common tailrace channel of two pump-storage plants - physical and numerical simulation

Microfabricated All-Around-Electrode Ac Electroosmotic Pump With Simple Design And Increased Velocity Generation

Experimental study of the pressure fluctuations in a pump turbine at large partial flow conditions

Graph Chatbot

Chattez avec Graph Search

Optimization of a Shared Tailrace Channel of Two Pumped-Storage Plants by Physical and Numerical Modeling

Non-intrusive detection of rotating stall in pump-turbines

Experimental Investigation of Pressure Fluctuations in a High-Energy Centrifugal Pump Stage at Off-Design Conditions

Surge Wave Propagation in a Common Tailrace Channel for Two Large Pumped-Storage Plants

Coherent terabit communications with microresonator Kerr frequency combs

Sensing systems and methods for distributed Brillouin sensing

Impact Assessment of Pumping Parameters on Groundwater Bacterial Communities

Microfabricated All-Around-Electrode Ac Electroosmotic Pump With Simple Design And Increased Velocity Generation

Flow and waves in a common tailrace channel of two pump-storage plants - physical and numerical simulation

Experimental study of the pressure fluctuations in a pump turbine at large partial flow conditions