Total pressure fluctuations and two-phase flow turbulence in hydraulic jumps
Identifieur interne : 003F16 ( Main/Exploration ); précédent : 003F15; suivant : 003F17Total pressure fluctuations and two-phase flow turbulence in hydraulic jumps
Auteurs : HANG WANG [Australie] ; Frédéric Murzyn [France] ; Hubert Chanson [Australie]Source :
- Experiments in fluids [ 0723-4864 ] ; 2014.
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- Pascal (Inist)
English descriptors
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Abstract
The large-scale turbulence and high air content in a hydraulic jump restrict the application of many traditional flow measurement techniques. This paper presents a physical modelling of hydraulic jump, where the total pressure and air-water flow properties were measured simultaneously with intrusive probes, namely a miniature pressure transducer and a dual-tip phase-detection probe, in the jump roller. The total pressure data were compared to theoretical values calculated based upon void fraction, water depth and flow velocity measured by the phase-detection probe. The successful comparison showed valid pressure measurement results in the turbulent shear region with constant flow direction. The roller region was characterised by hydrostatic pressure distributions, taking into account the void fraction distributions. The total pressure fluctuations were related to both velocity fluctuations in the air-water flow and free-surface dynamics above the roller, though the time scales of these motions differed substantially.
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Loire</region><settlement type="city">Laval (Mayenne)</settlement></placeName></affiliation></author><author><name sortKey="Chanson, Hubert" sort="Chanson, Hubert" uniqKey="Chanson H" first="Hubert" last="Chanson">Hubert Chanson</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Civil Engineering, The University of Queensland</s1><s2>Brisbane, QLD 4072</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Brisbane, QLD 4072</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">15-0008862</idno><date when="2014">2014</date><idno type="stanalyst">PASCAL 15-0008862 INIST</idno><idno type="RBID">Pascal:15-0008862</idno><idno type="wicri:Area/PascalFrancis/Corpus">000138</idno><idno type="wicri:Area/PascalFrancis/Curation">005D15</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000044</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" 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wicri:level="3"><inist:fA14 i1="02"><s1>ESTACA Campus Ouest, Parc Universitaire de Laval Changé, BP 53061</s1><s2>Laval</s2><s3>FRA</s3><sZ>2 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region">Pays de la Loire</region><region type="old region">Pays de la Loire</region><settlement type="city">Laval (Mayenne)</settlement></placeName></affiliation></author><author><name sortKey="Chanson, Hubert" sort="Chanson, Hubert" uniqKey="Chanson H" first="Hubert" last="Chanson">Hubert Chanson</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Civil Engineering, The University of Queensland</s1><s2>Brisbane, QLD 4072</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Brisbane, QLD 4072</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Experiments in fluids</title><title level="j" type="abbreviated">Exp. fluids</title><idno type="ISSN">0723-4864</idno><imprint><date when="2014">2014</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Experiments in fluids</title><title level="j" type="abbreviated">Exp. fluids</title><idno type="ISSN">0723-4864</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Air water interface</term><term>Experimental study</term><term>Hydraulic jump</term><term>Hydraulics</term><term>Measurement method</term><term>Open channel flow</term><term>Pressure fluctuation</term><term>Probe</term><term>Test facility</term><term>Turbulence structure</term><term>Two phase flow</term><term>Void fraction</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Ecoulement diphasique</term><term>Structure turbulence</term><term>Interface air eau</term><term>Fluctuation pression</term><term>Ressaut hydraulique</term><term>Etude expérimentale</term><term>Installation essai</term><term>Sonde</term><term>Méthode mesure</term><term>Hydraulique</term><term>Fraction vide</term><term>Ecoulement canal découvert</term><term>4785D</term><term>4780</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The large-scale turbulence and high air content in a hydraulic jump restrict the application of many traditional flow measurement techniques. This paper presents a physical modelling of hydraulic jump, where the total pressure and air-water flow properties were measured simultaneously with intrusive probes, namely a miniature pressure transducer and a dual-tip phase-detection probe, in the jump roller. The total pressure data were compared to theoretical values calculated based upon void fraction, water depth and flow velocity measured by the phase-detection probe. The successful comparison showed valid pressure measurement results in the turbulent shear region with constant flow direction. The roller region was characterised by hydrostatic pressure distributions, taking into account the void fraction distributions. The total pressure fluctuations were related to both velocity fluctuations in the air-water flow and free-surface dynamics above the roller, though the time scales of these motions differed substantially.</div></front></TEI><affiliations><list><country><li>Australie</li><li>France</li></country><region><li>Pays de la Loire</li></region><settlement><li>Laval (Mayenne)</li></settlement></list><tree><country name="Australie"><noRegion><name sortKey="Hang Wang" sort="Hang Wang" uniqKey="Hang Wang" last="Hang Wang">HANG WANG</name></noRegion><name sortKey="Chanson, Hubert" sort="Chanson, Hubert" uniqKey="Chanson H" first="Hubert" last="Chanson">Hubert Chanson</name></country><country name="France"><region name="Pays de la Loire"><name sortKey="Murzyn, Frederic" sort="Murzyn, Frederic" uniqKey="Murzyn F" first="Frédéric" last="Murzyn">Frédéric Murzyn</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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