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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/12267
Title: Review of hydrodynamics instabilities in Francis turbine during off-design and transient operations
Authors: Goyal R.
Gandhi, Bhupendra K.
Published in: Renewable Energy
Abstract: Electricity generation from solar and wind has raised a significant concern about the stability of grid networks. Hydroelectricity plays an important role to balance the stability of grid network. In order to improve the stability of presently high loaded grids, hydropower plants are being operated over a wide range of operations and experiencing frequent start-stop, load variation, and emergency shutdown. The power generating unit including turbine needs to sustain sudden change in its operating condition to balance the grid frequency. The objective of this paper is to present the operating problems of Francis turbine in the present energy generation scenario. The turbine suffers from several dynamic instabilities during off-design and transient operations. Several low and high-frequency pressure fluctuations are observed during both, steady state and transient operating conditions. The off-design operations such as part load and high load cause pressure fluctuations due to RSI, RVR and cavitation. The transient operations lead to heavy cyclic loading of its moving and stationary parts. Francis turbine also experiences asymmetric loading on the runner, cyclic stress, wear and tear; all of which reduce operating life of the components. Sometimes these rapid transient may cause failure of the unit and decouple it from the system. © 2017
Citation: Renewable Energy (2018), 116(): 697-709
URI: https://doi.org/10.1016/j.renene.2017.10.012
http://repository.iitr.ac.in/handle/123456789/12267
Issue Date: 2018
Publisher: Elsevier Ltd
Keywords: Francis turbine
Hydropower
Rotating vortex rope
Rotor-stator interaction
Steady-state operations
Transient operations
ISSN: 9601481
Author Scopus IDs: 57191617201
7006087147
Author Affiliations: Goyal, R., Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee, 247667, India
Gandhi, B.K., Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee, 247667, India
Funding Details: Rahul Goyal and B.K. Gandhi are thankful to Ministry of Human Resource Development for the financial support.
Corresponding Author: Gandhi, B.K.; Department of Mechanical and Industrial Engineering, Indian Institute of TechnologyIndia; email: bkgmefme@iitr.ac.in
Appears in Collections:Journal Publications [ME]

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