Detail publikačního výsledku

Spatio-Temporal Description of the Swirling Flow in Hydraulic Turbine

RUDOLF, P.; ŠTEFAN, D.; KLAS, R.

Originální název

Spatio-Temporal Description of the Swirling Flow in Hydraulic Turbine

Anglický název

Spatio-Temporal Description of the Swirling Flow in Hydraulic Turbine

Druh

Článek WoS

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.

Anglický 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

swirling flow, draft tube, proper orthogonal decomposition, reduced order model

Klíčová slova v angličtině

swirling flow, draft tube, proper orthogonal decomposition, reduced order model

Autoři

RUDOLF, P.; ŠTEFAN, D.; KLAS, R.

Rok RIV

2016

Vydáno

05.05.2015

Nakladatel

Springer Vieweg

Místo

Wiesbaden

ISSN

0043-0978

Periodikum

WasserWirtschaft

Svazek

2015

Číslo

1

Stát

Spolková republika Německo

Strany od

18

Strany do

22

Strany počet

5

BibTex

@article{BUT114878,
  author="Pavel {Rudolf} and David {Štefan} and Roman {Klas}",
  title="Spatio-Temporal Description of the Swirling Flow in Hydraulic Turbine",
  journal="WasserWirtschaft",
  year="2015",
  volume="2015",
  number="1",
  pages="18--22",
  doi="10.1007/s35147-015-0511-5",
  issn="0043-0978"
}