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Projects / Programmes source: ARIS

Dynamic behaviour of guard-gates in hydroelectric power plants

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Research activity

Code Science Field Subfield
2.13.07  Engineering sciences and technologies  Process engineering  Water power 

Code Science Field
T140  Technological sciences  Energy research 
Keywords
water power, guard-gate, model measurements, finite volume method, water hammer
Evaluation (rules)
source: COBISS
Evaluation of bibliographic research performance indicators according to ARIS methodology
Citations Citations for bibliographic records in COBIB.SI that are linked to records in citation databases
source: WoS source: Scopus source: COBISS
Researchers (3)
no. Code Name and surname Research area Role Period No. of publications
1.  03923  PhD Anton Bergant  Process engineering  Head  2002 - 2003  392 
2.  16219  MSc Erazem Polutnik  Process engineering  Researcher  2002 - 2003  19 
3.  15525  MSc Primož Rodič  Hydrology  Researcher  2002 - 2003  161 
Organisations (2)
no. Code Research organisation City Registration number No. of publications
1.  0782  University of Ljubljana, Faculty of Mechanical Engineering  Ljubljana  1627031  29,214 
2.  1500  Institute for hydraulic research  Ljubljana  5885434000  534 
Abstract
The guard-gate can be installed at the inlet of the pressure tunnel, at the downstream end of the surge tank or in the draft tube of the water turbine. A hydraulic shape of the gate and characteristics of the flow-passage system of the power plant (turbine runaway, penstock rupture, power plant layout) govern the magnitude of pressure forces during the gate closure. Optimal gate closure is essential for safe operation of the hydroelectric power plant. The main objective of the research is dynamic analysis of a vertical leaf gate installed in a penstock. Modern leaf gate should provide safe operation of the plant at extreme flow capacities. Development of the gate model is based on theoretical and experimental investigations in the hydraulic laboratory. There is a limited knowledge about hydraulic interactions between the guard-gate and elements of the flow-passage system of the hydroelectric power plant. Theoretical and computational flow investigations will cover a vertical leaf gate at different gate openings. Flow computations will be performed by standard numerical methods (finite volume method). The results of computations will be compared with the results of measurements on a hydraulically similar gate. The influence of the gate shape on the gate discharge and hydraulic force characteristics will be investigated. Operational regimes of the guard-gate (closure at turbine runaway or pensock rupture) induce water hammer and possible water column separation resulting in increased dynamic loads on power plant elements. A theoretical model will be developed including essential power plant elements. Dynamic analysis of guard-gate operation in hydroelectric power plant Plave II, Slovenia will be carried out with the aid of the new model.
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