Title of article
Evolutionofthestructureofagas–liquidtwo-phaseflowinalargeverticalpipeOriginalResearchArticle
Author/Authors
Horst-MichaelPrasser، نويسنده , , MatthiasBeyer، نويسنده , , HelmarCarl، نويسنده , , SabineGregor، نويسنده , , DirkLucas، نويسنده , , HeikoPietruske، نويسنده , , PeterSchütz، نويسنده , , Frank-PeterWeiss، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2007
Pages
14
From page
1848
To page
1861
Abstract
Theevolutionofthestructureofagas–liquidflowinalargeverticalpipeof195mminnerdiameterwasinvestigatedattheTOPFLOWtestfacilityinRossendorf.Wire-meshsensorswereusedtomeasuresequencesoftwo-dimensionaldistributionsoflocalinstantaneousgasfractionwithinthecompletepipecross-section.Thesensorsownaresolutionof3mmatafrequencyof2500Hz.Superficialvelocitieswerevariedinarangecoveringflowregimesfrombubblytochurn-turbulentflow.Thedistancebetweenthegasinjectionandthesensorpositionwaschangedusingaso-calledvariablegasinjectionsystem.Itconsistsofsixgasinjectionunits,eachequippedwiththreeringsofinjectionorificesinthepipewall(orificediameter:1and4mm),whicharefedfromringchambers.Thegasflowtowardsthesedistributorchambersisindividuallycontrolledbyvalves.Measuredbubble-sizeresolvedradialgasfractionprofilesrevealdifferencesinthelateralmigrationofbubblesofdifferentsizestartingfromtheinjectionatthewall.Theevolutionofbubble-sizedistributionsallowstostudybubblecoalescenceandbreak-up.Theinfluenceofthephysicalpropertiesofthefluidwasstudiedbycomparingcoldair–waterexperimentswithsteam–watertestsat65bar.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2007
Journal title
Nuclear Engineering and Design Eslah
Record number
941366
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