Detail publikace

Manipulation of the swirling flow instability in hydraulic turbine diffuser by different methods of water injection

RUDOLF, P. LITERA, J. IBARRA BOLANOS, G. ŠTEFAN, D.

Originální název

Manipulation of the swirling flow instability in hydraulic turbine diffuser by different methods of water injection

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

diffuser; swirling flow; water injection; draft tube

Autoři

RUDOLF, P.; LITERA, J.; IBARRA BOLANOS, G.; ŠTEFAN, D.

Vydáno

4. 6. 2018

Nakladatel

EDP Sciences

ISSN

2100-014X

Periodikum

EPJ Web of Conferences

Stát

Francouzská republika

Strany od

1

Strany do

6

Strany počet

6

URL

https://www.epj-conferences.org/articles/epjconf/abs/2018/15/epjconf_efm2018_02090/epjconf_efm2018_02090.html

Plný text v Digitální knihovně

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"
}