Publication detail

ANALYSIS OF PRESSURE PULSATIONS OF CAVITATING FLOW IN CONVERGING-DIVERGING NOZZLE

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

Czech title

Analýza tlakových pulzací kavitujícího proudění v konvergenčně-divergenční trysce

English title

ANALYSIS OF PRESSURE PULSATIONS OF CAVITATING FLOW IN CONVERGING-DIVERGING NOZZLE

Type

conference paper

Language

en

Original abstract

Cavitating flow in converging-diverging nozzle (axisymmetric Venturi tube) is investigated. Characterization of the cavitating flow was done with high speed camera and the basic flow patterns were determined: incipient cavitation, partial cavitation, fully developed cavitation and supercavitation. Pressure transducers of tenzometric and piezoelectric types were used to determine amplitude-frequency characteristics of the pressure pulsations in particular regimes. Results were correlated with spectral properties obtained from high-speed camera video sequences and image processing analysis. Finally, attempt of unsteady cavitating flow CFD simulation is presented.

Czech abstract

V rámci článku byla zkoumána dynamika kavitujícího proudění v konvergenčně-divergenční trysce.

English abstract

Cavitating flow in converging-diverging nozzle (axisymmetric Venturi tube) is investigated. Characterization of the cavitating flow was done with high speed camera and the basic flow patterns were determined: incipient cavitation, partial cavitation, fully developed cavitation and supercavitation. Pressure transducers of tenzometric and piezoelectric types were used to determine amplitude-frequency characteristics of the pressure pulsations in particular regimes. Results were correlated with spectral properties obtained from high-speed camera video sequences and image processing analysis. Finally, attempt of unsteady cavitating flow CFD simulation is presented.

Keywords in English

Cavitation; CFD; OpenFoam; Venturi tube; Vortex ring; FFT

RIV year

2015

Released

09.09.2015

ISBN

978-961-6770-31-6

Book

Cavitation and dynamic problems - IAHRWG 2015 - Proceedings

Pages from–to

10–19

Pages count

9

BIBTEX


@inproceedings{BUT117617,
  author="Jiří {Kozák} and Pavel {Rudolf} and David {Štefan} and Martin {Hudec} and Milan {Gríger},
  title="ANALYSIS OF PRESSURE PULSATIONS OF CAVITATING FLOW IN CONVERGING-DIVERGING NOZZLE",
  booktitle="Cavitation and dynamic problems - IAHRWG 2015 - Proceedings",
  year="2015",
  month="September",
  pages="10--19",
  isbn="978-961-6770-31-6"
}