Spatio-temporal description of the swirling flow in hydraulic turbine draft tube

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F14%3APU111796" target="_blank" >RIV/00216305:26210/14:PU111796 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Spatio-temporal description of the swirling flow in hydraulic turbine draft tube

Original language description

Highly swirling flow leaves runner of the hydraulic turbine, which is operated off the best efficiency point. Instability of the swirling flow results in so called vortex rope. Rotating vortex rope is a source of pressure pulsations, causes structural loads, vibrations and noise. Proper orthogonal decomposition (POD) provides a spatio-temporal description of the draft tube swirling flow and proves that only a very limited number of the flow eigenmodes is necessary to describe the flow dynamics. Construction of the reduced order model (ROM), which is derived by projection of Navier-Stokes equation onto POD basis forms a suitable state equation for the draft tube flow control. Paper presents review of POD application to draft tube flows and proposal of extension to ROM and closed loop flow control.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JE - Non-nuclear power engineering, energy consumption and utilization

OECD FORD branch

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Project

<a href="/en/project/GA13-23550S" target="_blank" >GA13-23550S: Experimental research and mathematical modelling of unsteady phenomena induced by hydrodynamic cavitation</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2014

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings of 18th International Seminar on Hydropower

ISBN

978-3-9501937-9-4

ISSN

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e-ISSN

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Number of pages

10

Pages from-to

191-201

Publisher name

TU Wien

Place of publication

Vienna

Event location

Vienna

Event date

Nov 26, 2014

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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