Detail publikace

Kavitace ve vírovém proudění

RUDOLF, P. ŠTEFAN, D. HUDEC, M. KOZÁK, J.

Český název

Kavitace ve vírovém proudění

Anglický název

Cavitation in swirling flows

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

en

Originální abstrakt

Cavitation often appears in tip vortices of ship propellers or in vortex ropes behind hydraulic turbine runners. Cavitating vortices are source of pressure pulsations, noise and vibrations. Present contribution focuses on behaviour of cavitating vortical structures, development of cavitating patterns and dynamics of the strongly swirling cavitating flows. Both experimental and computational results are presented for cases of straight and spiral cavitating structures. Role of additional vorticity generation due to presence of the phase interface is discussed. Additionally, advantage of using proper orthogonal decomposition (POD) methodology for complete spatio-temporal description of the cavitating flows behavior is presented and documented, again both on data from experimental visualizations and computational simulations.

Český abstrakt

Koherentní kavitující vírové struktury (např. vírový cop v sací troubě vodní turbíny nebo kavitující vír u lodního šroubu) jsou výrazným zdrojem tlakových pulzací. Článek se zaměřuje na možnosti modelování těchto jevů metodami CFD, využití metody POD pro popis kavitujícího proudění kolem hydraulického profilu a na pozitivní využití kavitace při potlačení sinic.

Anglický abstrakt

Cavitation often appears in tip vortices of ship propellers or in vortex ropes behind hydraulic turbine runners. Cavitating vortices are source of pressure pulsations, noise and vibrations. Present contribution focuses on behaviour of cavitating vortical structures, development of cavitating patterns and dynamics of the strongly swirling cavitating flows. Both experimental and computational results are presented for cases of straight and spiral cavitating structures. Role of additional vorticity generation due to presence of the phase interface is discussed. Additionally, advantage of using proper orthogonal decomposition (POD) methodology for complete spatio-temporal description of the cavitating flows behavior is presented and documented, again both on data from experimental visualizations and computational simulations.

Klíčová slova česky

kavitace, vírové proudění, vířivost, POD

Klíčová slova anglicky

cavitation, swirling flow, vorticity, POD

Vydáno

08.12.2014

Nakladatel

RUB Bochum

Místo

Bochum

Kniha

Proceedings of Kolloquium Kavitation und Kavitations Erosion

Strany od–do

1–15

Počet stran

15

BIBTEX


@inproceedings{BUT111331,
  author="Pavel {Rudolf} and David {Štefan} and Martin {Hudec} and Jiří {Kozák},
  title="Cavitation in swirling flows",
  booktitle="Proceedings of Kolloquium Kavitation und Kavitations Erosion",
  year="2014",
  month="December",
  pages="1--15",
  publisher="RUB Bochum",
  address="Bochum"
}