Detail publikace

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

RUDOLF, P. ŠTEFAN, D.

Anglický název

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

Typ

Stať ve sborníku v databázi WoS či Scopus

Jazyk

en

Originální abstrakt

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.

Klíčová slova anglicky

draft tube, vortex rope, POD, ROM, control

Vydáno

2014-11-26

Nakladatel

TU Wien

Místo

Vienna

ISBN

978-3-9501937-9-4

Kniha

Proceedings of 18th International Seminar on Hydropower

Strany od–do

191–201

Počet stran

10

BIBTEX


@inproceedings{BUT111329,
  author="Pavel {Rudolf} and David {Štefan}",
  title="Spatio-temporal description of the swirling flow in hydraulic turbine draft tube",
  booktitle="Proceedings of 18th International Seminar on Hydropower",
  year="2014",
  pages="191--201",
  publisher="TU Wien",
  address="Vienna",
  isbn="978-3-9501937-9-4"
}