Detail publikace

Connection between inlet velocity field and diffuser flow instability

RUDOLF, P.

Originální název

Connection between inlet velocity field and diffuser flow instability

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

Simulations of the flow in a straight diffuser were carried out for different inlet velocity profiles equivalent to the real turbine operating points. Frequencies and magnitudes of pressure pulsations of the rotating vortex rope were recorded. Two types of vortices were detected. The first one is a thin vortex with higher frequency and relatively low pressure amplitudes corresponding to higher part load turbine operation. For lower loads, further from best efficiency point, a huge vortex rotating on higher diameter appears, which is accompanied by massive pressure pulsations, but with lower frequency. Connections of these two regimes with inlet circumferential velocity com-ponent are discussed in the paper.

Klíčová slova

instability, diffuser, vortex rope, hydraulic turbine

Autoři

RUDOLF, P.

Rok RIV

2009

Vydáno

1. 6. 2009

Nakladatel

University of West Bohemia

Místo

Plzeň

ISSN

1802-680X

Periodikum

Applied andComputational Mechanics

Ročník

3

Číslo

1

Stát

Česká republika

Strany od

177

Strany do

184

Strany počet

8

BibTex

@article{BUT47117,
  author="Pavel {Rudolf}",
  title="Connection between inlet velocity field and diffuser flow instability",
  journal="Applied andComputational Mechanics",
  year="2009",
  volume="3",
  number="1",
  pages="177--184",
  issn="1802-680X"
}