P_Nucleate Pool Boiling Experiments (NPBX) on the International Space Station.pdf

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1、MicrogravitySci.Technol.(2012)24:307–325DOI10.1007/s12217-012-9315-8ORIGINALARTICLENucleatePoolBoilingExperiments(NPBX)ontheInternationalSpaceStationVijayKumarDhir·GopinathR.Warrier·EduardoAktinol·DavidChao·JefferyEggers·WilliamSheredy·WendellBoothReceived:5December2011/Accepted:13J

2、une2012/Publishedonline:19July2012©SpringerScience+BusinessMediaB.V.2012AbstractDuringtheperiodofMarch–May2011,ase-totheheatersurfacevariedfrom1.2×10−7gto6×eriesofboilingexperimentswascarriedoutintheBoil-10−7g.TheresultsoftheexperimentsshowthataeingExperimentalFacility(BXF)locatedin

3、theMicro-singlebubblecontinuestogrowtooccupythesizeofgravityScienceGlovebox(MSG)oftheInternationalthechamberwithoutdepartingfromtheheatersurface.SpaceStation(ISS).TheBXFFacilitywascarriedtoDuringlateralmergerofbubbles,athighsuperheatsISSonSpaceShuttleMissionSTS–133onFebruary24,alarg

4、ebubblemayliftofffromthesurfacebutcon-2011.NucleatePoolBoilingExperiment(NPBX)wastinuestohovernearthesurface.NeighboringbubblesoneofthetwoexperimentshousedintheBXF.Resultsarecontinuouslypulledintothelargebubble.Atlowofexperimentsonsinglebubbledynamics(e.g.,incep-superheatsbubblesatn

5、eighboringsitessimplymergetotionandgrowth),multiplebubbledynamics(lateralyieldalargerbubble.Thelargerbubblemostlylocatesmergeranddeparture,ifany),nucleatepoolboilinginthemiddleoftheheatedsurfaceandservesasaheattransfer,andcriticalheatfluxaredescribed.Invaporsink.Thelattermodecontinu

6、estopersistwhentheexperimentsPerfluoro-n-hexanewasusedastheboilingisoccurringallovertheheatersurface.Heattestliquid.Thesystempressurewasvariedfrom51tofluxesforsteadystatenucleateboilingandcriticalheat243kPa,pooltemperaturewasvariedfrom30◦to59◦C,fluxesarefoundtobemuchlowerthanthoseob

7、tainedandtestsurfacetemperaturewasvariedfrom40◦tounderearthnormalgravityconditions.Thedataare80◦C.Thetestsurfacewasapolishedaluminumdiscusefulforcalibrationofresultsofnumericalsimula-(1mmthick,89.5mmindiameter)heatedfrombelowtions.Anycorrelationsthataredevelopedfornucleatewithstrain

8、gageheaters.Fivecyl