Publication detail
Energy transformation and flow topology in an elbow draft tube
ŠTEFAN, D. RUDOLF, P. SKOTÁK, A. MOTYČÁK, L.
Czech title
Energetické přeměny a topologie proudění v kolenové sací troubě
English title
Energy transformation and flow topology in an elbow draft tube
Type
conference paper
Language
en
Original abstract
Paper presents a computational study of energy transformation in two geometrical configurations of Kaplan turbine elbow draft tube. Pressure recovery, hydraulic efficiency and loss coefficient are evaluated for a series of flow rates and swirl numbers corresponding to operating regimes of the turbine. These integral characteristics are then correlated with local flow field properties identified by extraction of topological features. Main reason is to find the reasons for hydraulic efficiency drop of the elbow draft tube.
Czech abstract
Práce se zabývá studií energetické přeměny v kolenové sací troubě Kaplanovi turbíny. Hodnoty hydraulické účinnosti, koeficientu regenerace tlaku a ztrátového součinitele byly vyhodnoceny pro několik hodnot průtoku odpovídajícíh provozním bodům turbíny. Tyto integrální charakteristiky jsou později použity k vyhodnocení energetické bilance s ohledem na lokální charakter proudového pole, popsaného pomocí topologie čar smykového tření.
English abstract
Paper presents a computational study of energy transformation in two geometrical configurations of Kaplan turbine elbow draft tube. Pressure recovery, hydraulic efficiency and loss coefficient are evaluated for a series of flow rates and swirl numbers corresponding to operating regimes of the turbine. These integral characteristics are then correlated with local flow field properties identified by extraction of topological features. Main reason is to find the reasons for hydraulic efficiency drop of the elbow draft tube.
Keywords in Czech
sací trouba, hydraulická účinnost, koeficient regenerace tlaku, topologie proudění
Keywords in English
draft tube, hydraulic efficiency, pressure recovery, flow topology
RIV year
2011
Released
07.11.2011
Publisher
ZČU - Plzeň
Location
Plzeň
ISBN
978-80-261-0027-0
Book
COMPUTATIONAL MECHANICS 2011, EXTENDED ABSTRACTS
Pages from–to
55–56
Pages count
2
BIBTEX
@inproceedings{BUT75629,
author="David {Štefan} and Pavel {Rudolf} and Aleš {Skoták} and Lukáš {Motyčák},
title="Energy transformation and flow topology in an elbow draft tube",
booktitle="COMPUTATIONAL MECHANICS 2011, EXTENDED ABSTRACTS",
year="2011",
month="November",
pages="55--56",
publisher="ZČU - Plzeň",
address="Plzeň",
isbn="978-80-261-0027-0"
}