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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/17801
Title: Experimental investigation on a high head model Francis turbine during load rejection
Authors: Goyal R.
Bergan C.
Cervantes M.J.
Gandhi B.K.
Dahlhaug O.G.
Published in: Proceedings of IOP Conference Series: Earth and Environmental Science
Abstract: Francis-99 is a set of workshop aiming to determine the state of the art of high head model Francis turbine simulations (flow and structure) under steady and transient operating conditions as well as to promote their development and knowledge dissemination openly. The first workshop (Trondheim, 2014) was concerned with steady state operation. The second workshop will focus on transient operations such as load variation and start-stop. In the present work, 2-D particle image velocimetry (PIV) with synchronized pressure measurements performed in the draft tube cone of the Francis-99 test case during load rejection is presented. Pressure sensors were mounted in the vaneless space and draft tube cone to estimate the instantaneous pressure fluctuations while operating the turbine from the best efficiency point (9.8°) to part load (6.7°) with the presence of a rotating vortex rope (RVR). The time-resolved velocity and pressure data are presented in this paper showing the transition in the turbine from one state to another.
Citation: Proceedings of IOP Conference Series: Earth and Environmental Science, (2016)
URI: https://doi.org/10.1088/1755-1315/49/8/082004
http://repository.iitr.ac.in/handle/123456789/17801
Issue Date: 2016
Publisher: Institute of Physics Publishing
Keywords: Francis turbines
Hydraulic machinery
Hydraulic turbines
Pressure measurement
Velocity measurement
Best efficiency point
Experimental investigations
Instantaneous pressures
Knowledge dissemination
Particle image velocimetries
Steady and transient
Steady-state operation
Transient operation
Hydraulic motors
ISSN: 17551307
Author Scopus IDs: 57191617201
56458776600
55328928400
7006087147
23008431600
Author Affiliations: Goyal, R., Indian Institute of Technology Roorkee, Roorkee, 247667, India, Department of Eng. Sci. and Math, Lulea University of Technology, LuleÃ¥, 97187, Sweden
Bergan, C., Waterpower Laboratory, Norwegian University of Science and Technology, Alfred Getz vei 4, Trondheim, 7034, Norway
Cervantes, M.J., Waterpower Laboratory, Norwegian University of Science and Technology, Alfred Getz vei 4, Trondheim, 7034, Norway, Department of Eng. Sci. and Math, Lulea University of Technology, Luleå, 97187, Sweden
Gandhi, B.K., Indian Institute of Technology Roorkee, Roorkee, 247667, India
Dahlhaug, O.G., Waterpower Laboratory, Norwegian University of Science and Technology, Alfred Getz vei 4, Trondheim, 7034, Norway
Funding Details: Rahul Goyal and Prof. Michel Cervantes are grateful to the Swedish water power center (SVC) for the financial support. The authors would like to thank the Norwegian Hydropower Centre (NVKS) for the financial support. The measurements have been carried out in collaboration between LTU, Sweden (NTNU, Norway) and IIT Roorkee. The author's gratitude also goes to the staff of water power laboratory, NTNU, Norway.
Appears in Collections:Conference Publications [ME]

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