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Title: Rotating vortex rope formation and mitigation in draft tube of hydro turbines – A review from experimental perspective
Authors: Kumar, Sandeep
Cervantes M.J.
Gandhi, Bhupendra K.
Published in: Renewable and Sustainable Energy Reviews
Abstract: Hydropower is a clean and renewable source of energy which is widely used to generate electric power and stabilize the power grid. It can respond quickly to any change in demand with the flexibility to operate over a wide range of time scales. At steady-state part-load operation, a flow structure known as precessing vortex rope develops in the draft tube of singly regulated reaction turbines, which causes large pressure pulsations. The vortex rope develops pressure pulsations in the draft tube cone, structural vibrations, power swings, pulsative pressure recovery, which are the main concerns in the hydropower sector. Studies were carried out to understand the inception as well as mitigation of these detrimental effects due to the rotating vortex rope (RVR) development. The primary focus of the present study is to comprehensively review the experimental investigations carried out to study the formation of RVR, its effects on turbine performance, and the methodologies developed to mitigate its impact. © 2020
Citation: Renewable and Sustainable Energy Reviews, 136
Issue Date: 2021
Publisher: Elsevier Ltd
Keywords: Francis turbine
Pressure pulsations
Vortex breakdown
ISSN: 13640321
Author Scopus IDs: 57201873447
Author Affiliations: Kumar, S., Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee, India
Cervantes, M.J., Department of Engineering Sciences and Mathematics, LTUNorrbotten 97187, Sweden
Gandhi, B.K., Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee, India
Funding Details: The authors are very thankful to the Ministry of Education (MoE), India, for providing financial support. The authors are also very thankful to the publishers/researchers for permission to reproduce some of the figures in this article. Kementerian Pendidikan Malaysia, KPM
Appears in Collections:Journal Publications [CS]

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