A CONTROL METHOD OF SURGING IN DISCHARGE CHANNEL WITH VERTICAL SHAFTS

A CONTROL METHOD OF SURGING IN DISCHARGE CHANNEL WITH VERTICAL SHAFTS

A discharge channel of a power station is composed of open channel, tunnel and vertical shafts. Surging phenomenon occurs in the discharge channel when pumps stop all at once. The surging propagates with highly pressurized flow forward the lower narrow channel to make the water spouting from the ver...

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Veröffentlicht in:PROCEEDINGS OF HYDRAULIC ENGINEERING 1998/02/20, Vol.42, pp.667-672
Hauptverfasser: Ohtani, Hideo, Sakai, Masafumi, Ishino, Kazuo, Arakawa, Shigeki, Mizumukai, Naoto
Format: Artikel
Sprache:eng
Schlagworte:
Discharge channel
field investigation
laboratory tests
numerical analysis
slot medel
surging
vertical shafts
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Beschreibung
Zusammenfassung:A discharge channel of a power station is composed of open channel, tunnel and vertical shafts. Surging phenomenon occurs in the discharge channel when pumps stop all at once. The surging propagates with highly pressurized flow forward the lower narrow channel to make the water spouting from the vertical shafts. We simulated physically the phenomena in the discharge channel through the laboratory tests and simulated mathmatically the water motion by means of the slot model. The laboratory tests, the calculation and the field investigation showed that the phenomenon of surging and spouting water could be depressed by a sophisticated stopping-operation of the pumps.
ISSN:0916-7374
1884-9172
DOI:10.2208/prohe.42.667