Publication detail

Spatio-Temporal Description of the Swirling Flow in Hydraulic Turbine

RUDOLF, P. ŠTEFAN, D. KLAS, R.

Original Title

Type

journal article in Web of Science

Language

English

Original Abstract

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.

Keywords

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

Authors

RUDOLF, P.; ŠTEFAN, D.; KLAS, R.

RIV year

2015

Released

5. 5. 2015

Publisher

Springer Vieweg

Location

Wiesbaden

ISBN

0043-0978

Periodical

WASSERWIRTSCHAFT

Year of study

2015

Number

State

Federal Republic of Germany

Pages from

Pages to

Pages count

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"
}