Detail publikace
Dekompozice vírového proudového pole pod obežným kolem Francisovy turbíny
RUDOLF, P. ŠTEFAN, D.
Český název
Dekompozice vírového proudového pole pod obežným kolem Francisovy turbíny
Anglický název
Decomposition of the swirling flow field downstream of Francis turbine runner
Typ
článek ve sborníku ve WoS nebo 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.
Český abstrakt
Článek prezentuje aplikaci vlastní ortogonální dekompozice (POD) na vírové proudění v sací troubě Francisovy turbíny pro dva provozní body. POD umožňuje identifikovat vlastní tvary tlaku a rychlosti a seřadit je dle jejich důležitosti pro výsledný obraz proudění. POD poskytuje významou doplňující informaci k běžným výpočtům v časové doméně.
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 česky
dekompozice, vírové proudění, vlastní ortogonální dekompozice, stabilita, vírový cop, sací trouba
Klíčová slova anglicky
decomposition, swirling flow, proper orthogonal decomposition, stability, vortex rope, draft tube
Rok RIV
2012
Vydáno
18.12.2012
Nakladatel
IOP Publishing Ltd.
ISSN
1755-1315
Kniha
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",
volume="15",
number="6",
month="December",
pages="1--8",
publisher="IOP Publishing Ltd.",
issn="1755-1315"
}