Publication detail

Cavitation in swirling flows

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

Czech title

Kavitace ve vírovém proudění

English title

Cavitation in swirling flows

Type

conference paper

Language

en

Original abstract

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.

Czech abstract

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.

English abstract

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.

Keywords in Czech

kavitace, vírové proudění, vířivost, POD

Keywords in English

cavitation, swirling flow, vorticity, POD

Released

08.12.2014

Publisher

RUB Bochum

Location

Bochum

Book

Proceedings of Kolloquium Kavitation und Kavitations Erosion

Pages from–to

1–15

Pages count

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"
}