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1、PERGAMONAppliedThermalEngineering19(1999)625±639PerformanceevaluationofaradiatorinadieselengineÐacasestudya,bcD.GangaCharyulu*,GajendraSingh,J.K.SharmaaEnergySystemsDivision,ThaparCorporateResearchandDevelopmentCentre,BhadsonRoad,PostBox68,Patiala,Punjab147001,IndiabThaparInstituteofEn
2、gineeringandTechnology,Patiala-147001,IndiacBeantCollegeofEngineeringandTechnology,Gurdaspur,Punjab,IndiaAccepted28April1998AbstractPerformanceevaluationofaradiatormountedonaturbo-chargeddieselenginehasbeenmadewithandwithoutfoulingfactor.Heattransferestimationindicatesthattheradiatoris
3、overdesigned.Thecharacteristicsoftheradiatorhavebeenanalyzedfordierenttuberowswithvaryingairmassvelocitiestoenablethedesignengineertoselectthesizedependingupontherequirementandapplication.Thestudyalsoexaminestheeectofdierentmaterialsofconstructionof®nsandtubes.Ithasbeenobservedthatthec
4、opper®nswithcopper,brassandcarbonsteeltubesoerthesameheattransferandpressuredropcharacteristics.However,thedesignermustlookintothemechanicalpropertiesofthesematerialsastheysuittherequirements.#1999ElsevierScienceLtd.Allrightsreserved.Keywords:Radiator;Heattransfer;Foulingfactor;Turbo-c
5、hargeddieselengine;PressuredropNomenclature2Atotalheattransfersurfacearea,m2A0free¯owareasononesideoftheexchanger,m2Afsurfaceareaof®nexposedtoheattransfer,m2Afrairsidefrontalareaononesideoftheexchanger,m2Anfnon®narea,m*Correspondingauthor.Tel.:91175393607;fax:91175212002/012;e-mail:gan
6、ga@tcrdcpt.ren.nic.in.1359-4311/99/$-seefrontmatter#1999ElsevierScienceLtd.Allrightsreserved.PII:S1359-4311(98)00064-7626D.GangaCharyuluetal./AppliedThermalEngineering19(1999)625±639b®nspacing,mB¯uid¯ow(air)length,mCfcircumferenceof®nexposedtoheattransfer,mCPspeci®cheatof¯uidatconstant
7、pressure,J/kg8CDhhydraulicdiameterof¯owpassage,mffanningfrictionfactor,dimensionless2Gmassvelocity,kg/msHtotalwater¯owlength,m2hheattransfercoecient,W/m8CjColburnfactor,dimensionlessk¯uidthermalconductivity,W/m8Ckfthermalconductivityof®nmaterial,W/m8Cl®nlengthforheatconductionfrompri
