Detail publikačního výsledku

Decomposition of the swirling flow field downstream of Francis turbine runner

RUDOLF, P.; ŠTEFAN, D.

Originální název

Decomposition of the swirling flow field downstream of Francis turbine runner

Anglický název

Decomposition of the swirling flow field downstream of Francis turbine runner

Druh

Stať ve sborníku v databázi WoS či Scopus

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.

Anglický 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

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

Klíčová slova v angličtině

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

Autoři

RUDOLF, P.; ŠTEFAN, D.

Rok RIV

2013

Vydáno

18.12.2012

Nakladatel

IOP Publishing Ltd.

Kniha

IOP Conference Series-Earth and Environmental Science

ISSN

1755-1315

Periodikum

IOP Conference Series: Earth and Environmental Science

Svazek

15

Číslo

6

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1

Strany do

8

Strany počet

8

URL

http://dx.doi.org/10.1088/1755-1315/15/6/062008

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="1755-1315",
  url="http://dx.doi.org/10.1088/1755-1315/15/6/062008"
}