Detail publikace

Decomposition of the swirling flow field downstream of Francis turbine runner

RUDOLF, P. ŠTEFAN, D.

Anglický název

Decomposition of the swirling flow field downstream of Francis turbine runner

Typ

Stať ve sborníku v databázi WoS či Scopus

Jazyk

en

Originální abstrakt

Practical application of proper orthogonal decomposition (POD) is presented. Spatio-temporal behaviour of the coherent vortical structures in the draft tube of hydraulic turbine is studied for two partial load operating points. POD enables to identify the eigen modes, which compose the flow field and rank the modes according to their energy. Swirling flow fields are decomposed, which provides information about their streamwise and crosswise development and the energy transfer among modes. Presented methodology also assigns frequencies to the particular modes, which helps to identify the spectral properties of the flow with concrete mode shapes. Thus POD offers a complementary view to current time domain simulations or measurements.

Klíčová slova anglicky

decomposition, swirling flow, proper orthogonal decomposition, stability, vortex rope, draft tube

Vydáno

2012-12-18

Nakladatel

IOP Publishing Ltd.

ISSN

1755-1315

Kniha

IOP Conference Series-Earth and Environmental Science

Časopis

IOP Conference Series: Earth and Environmental Science

Ročník

15

Číslo

6

Strany od–do

1–8

Počet stran

8

BIBTEX


@inproceedings{BUT97197,
  author="Pavel {Rudolf} and David {Štefan}",
  title="Decomposition of the swirling flow field downstream of Francis turbine runner",
  booktitle="IOP Conference Series-Earth and Environmental Science",
  year="2012",
  journal="IOP Conference Series: Earth and Environmental Science",
  volume="15",
  number="6",
  pages="1--8",
  publisher="IOP Publishing Ltd.",
  doi="10.1088/1755-1315/15/6/062008",
  issn="1755-1307",
  url="http://dx.doi.org/10.1088/1755-1315/15/6/062008"
}