Detail publikačního výsledku

Stability of the Steady Flow in Rotationally Symmetrical Domain

POCHYLÝ, F.; RUDOLF, P.; HABÁN, V.; KOUTNÍK, J.; KRÜGER, K.

Originální název

Stability of the Steady Flow in Rotationally Symmetrical Domain

Anglický název

Stability of the Steady Flow in Rotationally Symmetrical Domain

Druh

Článek recenzovaný mimo WoS a Scopus

Originální abstrakt

Perturbation analysis with a linear approach of the flow in cylindrical domain was carried out in this paper. Analysis is based on Euler equations for inviscid fluid and continuity equation in rotating frame of reference. Eigen mode shapes of velocities visualize the flow patterns and eigen mode shapes of the cavitating vortex rope show origin of the elliptical vortex rope cross-section. Investigation confirms that boundary conditions have dominant effect on steady flow stability. Results indicate that careful design of the runner and the draft tube can lead to reduction of the instability consequences or to shifting the instability to different operational ranges.

Anglický abstrakt

Perturbation analysis with a linear approach of the flow in cylindrical domain was carried out in this paper. Analysis is based on Euler equations for inviscid fluid and continuity equation in rotating frame of reference. Eigen mode shapes of velocities visualize the flow patterns and eigen mode shapes of the cavitating vortex rope show origin of the elliptical vortex rope cross-section. Investigation confirms that boundary conditions have dominant effect on steady flow stability. Results indicate that careful design of the runner and the draft tube can lead to reduction of the instability consequences or to shifting the instability to different operational ranges.

Klíčová slova

Swirl, stability, rotationally symmetrical, eigen value, cylinder, draft tube, elliptical

Klíčová slova v angličtině

Swirl, stability, rotationally symmetrical, eigen value, cylinder, draft tube, elliptical

Autoři

POCHYLÝ, F.; RUDOLF, P.; HABÁN, V.; KOUTNÍK, J.; KRÜGER, K.

Vydáno

24.10.2007

Nakladatel

Politechnica University of Timisoara

Místo

Timisoara

ISSN

1224-6077

Periodikum

Scientific Bulletin of the "Politehnica" University of Timisoara

Svazek

52

Číslo

6

Stát

Rumunsko

Strany od

93

Strany do

100

Strany počet

8

Plný text v Digitální knihovně

http://hdl.handle.net/

BibTex

@article{BUT43906,
  author="František {Pochylý} and Pavel {Rudolf} and Vladimír {Habán} and Jiří {Koutník} and Klaus {Krüger}",
  title="Stability of the Steady Flow in Rotationally Symmetrical Domain",
  journal="Scientific Bulletin of the {"}Politehnica{"} University of Timisoara",
  year="2007",
  volume="52",
  number="6",
  pages="93--100",
  issn="1224-6077"
}