LIQUID CONTROL JET DURING PART LOAD OPERATION IN A HYDRAULIC TURBINE

A method and system to mitigate the pressure fluctuations in hydraulic turbines, operated at partial load, by injecting high velocity control jet (50) or jets of liquid downstream of the turbine runner, on the upper portion of the draft tube (22), along the machine axis; the liquid jet(s) flow rate...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	DEMERS, ERIC, VU, THI, CONG, NENNEMANN, BERND, SUSANRESIGA, ROMEO, FLORIN, CIOCAN, GABRIEL, DAN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING INDEXING SCHEME RELATING TO MACHINES OR ENGINES OTHER THANNON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, TO WIND MOTORS,TO NON-POSITIVE DISPLACEMENT PUMPS, AND TO GENERATING COMBUSTIONPRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04 LIGHTING MACHINES OR ENGINES FOR LIQUIDS MECHANICAL ENGINEERING OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR PRODUCING MECHANICAL POWER REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	A method and system to mitigate the pressure fluctuations in hydraulic turbines, operated at partial load, by injecting high velocity control jet (50) or jets of liquid downstream of the turbine runner, on the upper portion of the draft tube (22), along the machine axis; the liquid jet(s) flow rate can be adjusted continuously depending on the pressure fluctuation level in the draft tube, so as to control the swirling flow downstream of the runner and avoid helical vortex breakdown at partial load regimes, thus eliminating the main cause of pressure fluctuations. L'invention concerne un procédé et un système pour atténuer les fluctuations de pression dans des turbines hydrauliques, fonctionnant en charge partielle, par injection d'un jet (50) ou plusieurs jets de liquide de commande à grande vitesse en aval de la roue de turbine, sur la partie supérieure du tube d'aspiration (22), le long de l'axe de la machine ; le débit du ou des jets de liquide peut être ajusté en continu en fonction du niveau de fluctuation de pression dans le tube d'aspiration, de façon à commander l'écoulement tourbillonnaire en aval de la roue et à éviter la destruction de tourbillons hélicoïdaux à des régimes de charge partielle, permettant ainsi d'éliminer la principale cause des fluctuations de pression.