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Detail publikačního výsledku
RUDOLF, P.; LITERA, J.; IBARRA BOLANOS, G.; ŠTEFAN, D.
Original Title
Manipulation of the swirling flow instability in hydraulic turbine diffuser by different methods of water injection
English Title
Type
Paper in proceedings (conference paper)
Original Abstract
Vortex rope, which induces substantial pressure pulsations, arises in the draft tube (diffuser) of Francis turbine for off-design operating conditions. Present paper focuses on mitigation of those pulsations using active water jet injection control. Several modifications of the original Susan-Resiga’s idea were proposed. All modifications are driven by manipulation of the shear layer region, which is believed to play important role in swirling flow instability. While some of the methods provide results close to the original one, none of them works in such a wide range. Series of numerical experiments support the idea that the necessary condition for vortex rope pulsation mitigation is increasing the fluid momentum along the draft tube axis.
English abstract
Keywords
diffuser; swirling flow; water injection; draft tube
Key words in English
Authors
RIV year
2019
Released
04.06.2018
Publisher
EDP Sciences
Book
EPJ Web of Conferences
ISBN
2100-014X
Periodical
State
French Republic
Pages from
1
Pages to
6
Pages count
URL
https://www.epj-conferences.org/articles/epjconf/abs/2018/15/epjconf_efm2018_02090/epjconf_efm2018_02090.html
Full text in the Digital Library
http://hdl.handle.net/11012/196406
BibTex
@inproceedings{BUT148700, author="Pavel {Rudolf} and Jiří {Litera} and Germán Alejandro {Ibarra Bolanos} and David {Štefan}", title="Manipulation of the swirling flow instability in hydraulic turbine diffuser by different methods of water injection", booktitle="EPJ Web of Conferences", year="2018", journal="EPJ Web of Conferences", pages="1--6", publisher="EDP Sciences", doi="10.1051/epjconf/201817002090", issn="2100-014X", url="https://www.epj-conferences.org/articles/epjconf/abs/2018/15/epjconf_efm2018_02090/epjconf_efm2018_02090.html" }
Documents
epjconf_efm2018_02090