Detail publikace

Structure of Flow Fields Downstream of Two Different Swirl Generators

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

Originální název

Structure of Flow Fields Downstream of Two Different Swirl Generators

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

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

Rok RIV

2014

Vydáno

5. 2. 2014

ISSN

1805-4633

Periodikum

Engineering Mechanics

Ročník

20

Číslo

5

Stát

Česká republika

Strany od

339

Strany do

353

Strany počet

15

URL

http://www.engineeringmechanics.cz/pdf/20_5_339.pdf

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"
}