夾套式熱管傳熱特性實(shí)驗(yàn)研究及其換熱器殼程流場(chǎng)數(shù)值模擬.pdf

1、中南大學(xué)碩士學(xué)位論文夾套式熱管傳熱特性實(shí)驗(yàn)研究及其換熱器殼程流場(chǎng)數(shù)值模擬姓名：許欣申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：熱能工程指導(dǎo)教師：周孑民涂福炳20090401ABSTRACTHeatpipeexchangerusestheheatpipeasheattransferelement，andhastheadvantagesofhighefficiencylowpressureloss，goodreliabilityandcompactstruct

2、ureButthetraditionalheatpipeexchangerhastheseriousproblemofdewpointcorrosioninrecoveryoflowgradewasteheatTosolvethisproblem，thejacketedheatpipeexchangerisinventedThisnewtypeofheatpipeandheatpipeexchangerisinvestigatedint

3、hedissertationThemaincontributionsarelistedasfollows：TheexperimentalinvestigationwasconductedtoexploretheheattransfercharacteristicsofthejacketedheatpipeThetemperaturesontheouterwallunderdifferentheatfluxwerecollected，th

4、edistributionofthetemperatureontheouterwallwasanalyzedandtheheattransfercoefficientsofdifferentheatpipeswerecalculatedAccordingtotheprincipleoftheleastsquaremethod，anexperimentalcorrelationwasestablishedtorevealtherelati

5、onshipamongheattransfercoefficient，workingfluidrateandheatfluxThesystemerrorofHeatTransferCoe佑cientiSlessthan921％Adopttheporousmediummodeltocarryoutthethreedimensionalnumericalsimulationontheflowfieldoftheiacketedheatpip

6、eexchangerusingthecomputationalfluiddynamicsoftwareFLUENTandusethedatafromfieldtestastheboundaryconditionsThedistributionofstaticpressureisnearlylinearalongthedirectionofthegasflowandthetotalpressureincreaseswiththegasfl

7、owvelocityattheinletThesimulationresultsofthreedifferentdistributedresistanceshavethesan1etendencyAndtherelativeerrorofsimulationresultfromTaborekrelationiSlessthan8％Inordertomakeupthedeficiencyoflocalinformationofthehea