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1、Radiativeheattransfercalculationsection（辐射换热计算部分）Thispaperconsistsof314243530contributionsDOCdocumentsmayexperiencepoorbrowsingontheWAPside.ItisrecommendedthatyoufirstselectTXT,ordownloadthesourcefiletothelocalview.RadiativeheattransfercalculationsectionAbasicconcept
2、,mainlyincludes:thedefinitionandpropertiesofanglecoefficient;diffusegraysurfaceradiationheattransfercharacteristics;fromtheprincipleandapplicationofhotplate;gasradiationandsolarradiationcharacteristics.1,theradiationheatsealedcavitynetworkmethod.A:solvingtheradiative
3、transferproblemofthermalandelectricalOhm'slawincomparableanddrawaclosedcavitynetworkmethod.Aformulaforcalculatingtheradiativeheattransferbetweentwoarbitraryblackbodysurfacesispresented:,Informula(Eb1-Eb2),equaltopotentialdifference,Equivalenttoresistance,calledspacet
4、hermalresistance;Thenetradiationheattransferformulaofasurfacebetweentheashesisalsoderived:,Informula(Eb1-Eb2),equaltopotentialdifference,Equivalentresistance,calledsurfacethermalresistanceThespecificstepsareasfollows:firstofallthesurfacemustformaclosedsystem,andthend
5、rawtheresistancenetworkdiagram,thespecificmethodsare:1eachsurfacewith1nodes(thesurfaceshouldhavethecharacteristicsoftemperatureandsurfaceradiation,thesameabsorption)thermalpotentialforeffectiveradiationJi;thesurfaceofeachofthetwoconnectionaspacecorrespondingtothether
6、malresistance;eachsurfaceandgroundconnectionbetweenasurfaceresistanceandthe"battery"(blackbodyradiationforceEb);ifananglecoefficientis0,thespaceresistanceapproachesinfinity,thecorrespondingbetweenthetwosurfacescanbedisconnected,thespaceisnotconnectedifasurfaceinsulat
7、ionresistance;itishot,floatingpotential,andthegroundconnected.2,comparedwiththesurfaceblackbodyradiationsurfaceareJ=Eb.heavy,doesthismeanthattheblackbodysurfaceandheavyradiationmaskhavethesameproperties?Answer:Althoughthecharacteristicsofblackbodysurfaceandheavyradia
8、tionsurfaceareJ=Eb,butthetwohavedifferentThetemperatureoftheblackbodysurfacedoesnotdependonthesurfaceoftheotherparticipatingradiati
