Publication detail

Structure of Flow Fields Downstream of Two Different Swirl Generators

ŠTEFAN, D. RUDOLF, P. MUNTEAN, S. SUSAN-RESIGA, R.

English title

Structure of Flow Fields Downstream of Two Different Swirl Generators

Type

Peer-reviewed article not indexed in WoS or Scopus

Language

en

Original abstract

This paper discusses the comparison of the flow fields downstream of two different swirl generators. Both swirl generators are used to imitate the flow at the exit of the hydraulic turbine runner and study spatio-temporal behaviour of the swirling flow in the draft tube (i.e. outlet diffuser part of the hydraulic turbine), which undergoes breakdown into vortex rope. Unsteady CFD computations are carried out for identical Reynolds number. Resulting velocity and vorticity profiles are correlated with the structure of the vortex rope. Difference in excited pressure pulsations is illustrated on amplitude-frequency spectra of static wall pressure.

Keywords in English

swirl generator, vortex rope, velocity profiles, vorticity, pressure pulsations

Released

2014-02-05

ISSN

1805-4633

Journal

Engineering Mechanics

Volume

20

Number

5

Pages from–to

339–353

Pages count

15

BIBTEX


@article{BUT105575,
  author="ŠTEFAN, D. and RUDOLF, P. and MUNTEAN, S. and SUSAN-RESIGA, R.",
  title="Structure of Flow Fields Downstream of Two Different Swirl Generators",
  journal="Engineering Mechanics",
  year="2014",
  volume="20",
  number="5",
  pages="339--353",
  issn="1805-4633",
  url="http://www.engineeringmechanics.cz/pdf/20_5_339.pdf"
}