Publication detail

Decomposition of the swirling flow field downstream of Francis turbine runner

RUDOLF, P. ŠTEFAN, D.

English title

Decomposition of the swirling flow field downstream of Francis turbine runner

Type

Paper in proceedings (conference paper)

Language

en

Original abstract

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.

Keywords in English

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

Released

2012-12-18

Publisher

IOP Publishing Ltd.

ISSN

1755-1315

Book

IOP Conference Series-Earth and Environmental Science

Journal

IOP Conference Series: Earth and Environmental Science

Volume

15

Number

6

Pages from–to

1–8

Pages count

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"
}