Numerical and experimental investigation of tree-dimensional cavitating flow around a straight NACA2412 hydrofoil

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28645413%3A_____%2F16%3AN0000001" target="_blank" >RIV/28645413:_____/16:N0000001 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.oceaneng.2016.07.030" target="_blank" >http://dx.doi.org/10.1016/j.oceaneng.2016.07.030</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.oceaneng.2016.07.030" target="_blank" >10.1016/j.oceaneng.2016.07.030</a>

Result language

angličtina

Original language name

Numerical and experimental investigation of tree-dimensional cavitating flow around a straight NACA2412 hydrofoil

Original language description

This work deals with the experimental and the numerical investigation of unsteady cavitating flow around the straight NACA2412 hydrofoil at the incidence angle of 8 deg and the Reynolds number of 1.56Í106. The hydrofoil with the span/chord ratio of 1.25 corresponds to the experiments carried out in the cavitation tunnel. The numerical simulations play the main part in this study; nevertheless the experimental work is also presented as an important background for validation of the results. A comprehensive CFD analysis has been carried out with three advanced turbulence models including the SAS-SST, LES-WALE and DES models. The main attention is focused on the prediction of interactions between the re-entrant flow and cavitation structures as well as the cavitation excited pressure. The monitored pressure fluctuations during the cavity cycles as well as the intervals between the dominant pressure pulses are discussed in detail. To capture side-wall effects, the whole hydrofoil and tunnel test section have been modelled, without any symmetry or periodic boundary conditions. The numerical simulations show, that the dominant frequencies of the cavity oscillation are best predicted by the SAS-SST turbulence model and the Detached Eddy Simulation. The Large Eddy Simulation has provided the best description of vortical structures in the rear part of the hydrofoil but it underestimates the side-wall effects and overestimates the dominant frequencies of the cavity oscillation.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BK - Liquid mechanics

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Ocean Engineering

ISSN

00298018

e-ISSN

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Volume of the periodical

neuveden

Issue of the periodical within the volume

128

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

6

Pages from-to

357-382

UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-84979282918