numericalsimulationofconvectiveheattransferforsupercriticalco2ininclinedtubes
, PP. 31-35
Keywords: inclinedtube,supercriticalparameter,co2,buoyancy,convectionheattransfer,secondaryflowkineticenergy,walltemperature,numericalsimulation
Abstract:
numericalsimulationofconvectiveheattransferforsupercriticalco2incircletubeswithaninclinationof30°wasdeterminedtoinvestigatetheinfluenceofheatfluxandinletmassflowrateontheheattransfercharacteristics.usingtherelativesecondaryflowkineticenergyktoexpressthesecondaryflowintensityquantitatively，thedistributionoftubewalltemperatureandheattransfercoefficientintubecircumference，theheattransfercoefficientattopgeneratrix，thefanningfrictionfactorandtherelativesecondaryflowkineticenergykwereobtained.theresultsshowedthat，thetubewalltemperatureattopgeneratrixwashigherthanthatatthebottomgeneratrix，andthetopcircumferentialwalltemperaturewashigherthanthatatthebottom.theheatfluxhadlesseffectonheattransfercoefficient，thefanningfrictionfactor，andtherelativesecondaryflowkineticenergykattopgeneratrix，buttheinfluenceofinletmassflowonthemwasgreater.
| [1] | bringerrp,smithjm.heattransferinthecriticalregion[j].aichejournal,1957,3:49�55.
|
| [2] | hallwb.heattransfernearthecriticalpoint[j].advancesinheattransfer，1971，7:1�86.
|
| [3] | walischt，müllerm，d�rflerw，etal.theheattransfertosupercriticalcarbondioxideintubeswithmixedconvection[j].processtechnologyproceedings，1996,12:199�204.
|
| [4] | jiangpx，zhangy，zhaocr，etal.convectionheattransferofco2atsupercriticalpressuresinaverticalminitubeatrelativelylowreynoldsnumbers[j].experimentalthermalandfluidscience，2008，32:1628�1637.
|
| [5] | lizhihui，jiangpeixue.experimentalinvestigationofconvectionheattransferofco2atsupercriticalpressuresinaverticalcirculartubeatlowre[j].nuclearpowerengineering，2010，31:33�37.
|
| [6] | lizhihui，jiangpeixue.numericalsimulationofconvectionheattransferforco2atsupercriticalpressureinverticalcirculartube[j].atomicenergyscienceandtechnology，2009，43:247�251.
|
| [7] | liaosm，zhaots.anumericalinvestigationoflaminarconvectionofsupercriticalcarbondioxideinverticalmini/microtubes[j].progressincomputationalfluiddynamics，2002，2:144�152.
|
| [8] | liaosm，zhaots.measurementsofheattransfercoefficientsfromsupercriticalcarbondioxideflowinginhorizontalmini�microchannels[j].journalofheattransfer，2002，24:413�420.
|
| [9] | sillekensjjm.laminarmixedconvectioninducts[d].eindhovenuniversityoftechnology，1995.
|
| [10] | caoxl，raozh，liaosm.laminarconvectiveheattransferofsupercriticalco2inhorizontalminiaturecircularandtriangulartubes[j].appliedthermalengineering，2011，31:2374�2384.
|
| [11] | xufeng，guoliejin，baibofeng.mixedconvectiveheattransferofwaterflowinginpipeundersupercriticalpressure[j].journalofengineeringthermophysics，2005，26:76�80.
|
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