Title: Energy transformation and flow topology in an elbow draft tube
Authors: Štefan, David
Rudolf, Pavel
Skoták, Aleš
Motyčák, Lukáš
Citation: Applied and Computational Mechanics. 2012, vol. 6, no. 1, p. 93-106.
Issue Date: 2012
Publisher: University of West Bohemia
Document type: článek
URI: http://www.kme.zcu.cz/acm/index.php/acm/article/view/173/162
ISSN: 1802-680X (Print)
2336-1182 (Online)
Keywords: savky;efektivita;obnovení tlaku;topologie průtoku
Keywords in different language: draft tube;efficiency;pressure recovery;flow topology
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 focus is to find the reasons for hydraulic efficiency drop of the elbow draft tube.
Rights: © 2012 University of West Bohemia. All rights reserved.
Appears in Collections:Volume 6, number 1 (2012)
Volume 6, number 1 (2012)

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