Publication detail

Characterization of the cavitating flow in converging-diverging nozzle based on experimental investigations

RUDOLF, P. HUDEC, M. GRÍGER, M. ŠTEFAN, D.

Czech title

Experimentální charakteristika kavitujícího proudění v konvergentně-divergentní trysce

English title

Characterization of the cavitating flow in converging-diverging nozzle based on experimental investigations

Type

conference paper

Language

en

Original abstract

Cavitation phenomena occuring in converging-diverging nozzle (Venturi tube) are described in the paper. A closed test circuit with possibility to control both flow rate and static pressure level were used. Loss coefficient was evaluated for different sigma numbers resulting in full „static“ characterization of the nozzle. Visualizations of the cavitation pattern development were acquired and matched with evolution of the loss coefficient. Three cavitation regimes are described: partial cavitation, fully developed cavitation, supercavitation.

Czech abstract

Článek popisuje jevy související s kavitací v konvergentně-divergentní trysce (Venturiho dýze). Pro výzkum byl použit uzavřený okruh s možností řízení úrovně statického tlaku. Pro rozsah kavitačních čísel sigma byly změřeny hodnoty ztrátového součinitele a zjištěn úplný "statický" popis trysky. Následná vizualizace vysokorychlostní kamerou umožnila přiřazení jednotlivých oblastí vývoje ztrátového součinitele ke konkrétnímu typu kavitujícího proudění: částečné kavitaci, plně vyvinuté kavitaci, superkavitaci.

English abstract

Cavitation phenomena occuring in converging-diverging nozzle (Venturi tube) are described in the paper. A closed test circuit with possibility to control both flow rate and static pressure level were used. Loss coefficient was evaluated for different sigma numbers resulting in full „static“ characterization of the nozzle. Visualizations of the cavitation pattern development were acquired and matched with evolution of the loss coefficient. Three cavitation regimes are described: partial cavitation, fully developed cavitation, supercavitation.

Keywords in Czech

kavitace, konvergentně-divergentní tryska, vírový kroužek, ztrátový součinitel

Keywords in English

cavitation, converging-diverging nozzle, vortex ring, loss coefficient

RIV year

2014

Released

25.03.2014

Publisher

EDP Sciences

ISBN

978-80-260-5375-0

ISSN

2100-014X

Book

EPJ Web of Conferences

Volume

67

Number

1

Pages from–to

1–6

Pages count

6

BIBTEX


@inproceedings{BUT111333,
  author="Pavel {Rudolf} and Martin {Hudec} and Milan {Gríger} and David {Štefan},
  title="Characterization of the cavitating flow in converging-diverging nozzle based on experimental investigations",
  booktitle="EPJ Web of Conferences",
  year="2014",
  volume="67",
  number="1",
  month="March",
  pages="1--6",
  publisher="EDP Sciences",
  isbn="978-80-260-5375-0",
  issn="2100-014X"
}