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1005-0930201104-0635-009TS101.923Adoi10.3969/j.issn.1005-0930.2011.04.0132009-11-172010-12-2820100476651977—.E-mailpigzhu7979@163.com450007...PCMPCM.PCMsPhaseChangeMaterials1-2.207080NASA..—.3.PCM.1“—19420118JOURNALOFBASICSCIENCEANDENGINEERINGVol.19No.4August2011—”2.1.14ρmcpmTt=λm2Tx2+γ·qrade-γx+ρmQZt1ρm、cpmλm、.QZZ=1Z=0.γ1γ·qrade-γx.1ρmQZtPCMZ10.ZZ=12erfcT-TmT()02TmT0±2℃.....t≥0-λmTx=qrad+qcon3qradqcon21kW/m250%42kW/m2.-λmTx=qaircon+qairrad4qairconqairradqaircon=hifTif-Tos5qairrad=σεifεosT4if-T4os6TifTosσStephan-Boltzmannεifεoshif4.636Vol.191.2Pennes’5ρscpsTr=λsT+ρbcpbωbTs-T7ρscpsλs、3ρbcpbλb、ωb0.00125m3/sTs.37℃、34℃—37℃.176.—.21Fig.1Testingapparatusforthermalprotectiveperformance2.117NFPA1971.21kW/m25∶542kW/m2.55.4mm.ASTMF1939ASTMF1930.1.46W/m·K7.3×10-7m2/s.736No.412.8mm37℃.T380℃.2.23、.30℃—80℃.-microPCMsmicroPCMs8.1.1Table1Structuredetailsofeachlayerinthermalprotectiveclothing/mm/g/m2/W/m·K/J/kg·K1Metamax0.640.640.6410152PTFE0.830.830.83115030.620.620.6212500.610.610.611.1×105.TmTm+ΔTm3T<Tm、T>Tm+ΔTmTm<T<Tm+ΔTm39.3mm2.2Fig.2Schematicdiagramofmaterialcombinations836Vol.1922.1RPP.“+++”1.21kW/m230s76℃.3、0—6s.3Fig.3Comparisonbetweennumericalandexperimentalresultsoftemperatureevolutionofeachlayer、、.102Tr2+1rTr=1αTt82Tx2=1αTt9892Tr2+1rTr=2Tx210101rTr.936No.4.2.2.42kW/m250%30sTm39.6℃、35.8℃32.6℃.415—20s4℃..4Fig.4RelationbetweenvariationofskinsurfacetemperatureandmelttemperatureofPCM2.333℃33℃100℃..Henriques11HenriquesArrheniust2t2.21kW/m242kW/m230s32.6℃76℃2.2046Vol.19.21kW/m232.6℃75.6s.76℃32.6℃.40℃40℃.42kW/m276℃44.5s....12.2Table2EffectofconfigurationofPCMlayeronthermalprotectiveperformance/kW/m2214250%50%/℃32.67632.676123——/s47.566.375.660.954.227.936.838.744.541.64.1146No.423.1.、J.19961454-7ZhangXingxiangZhuMingru.Heat-preserveandtemperature-adaptablefiberandfabricsJ.TechnicalTextiles19961454-72.J.2008165671-678LiFengzhiWuChengyunLiYi.NumericalstudyoninfluenceofradiiandamountsofthephasechangemicrocapsulespackedintextilefabriconheatandmoisturetransferinthefabricJ.JournalofBasicScienceandEngineering2008165671-6783.J.200728168-7280LiHuaMaXiaoguangZhangXiaolinetal.CompositeofphasechangematerialsandautomatictemperatureconditioningtextilesmadethereofJ.JournalofTextileResearch200728168-72804ZhuFanglongZhangWeiyuan.Heattransferinacylindersheathedbyflame-resistantfabricsexposedtoconvectiveandradiantheatfluxJ.FireSafetyJournal2008436401-4095PennesHH.AnalysisoftissueandarterialbloodtemperaturesinrestinghumanforearmJ.JApplyPhysiology194893-1226PatankarSV.NumericalheattransferandfluidflowM.Taylor&Francis19802367.J.20071711134-140ZhuFanglongZhangWeiyuan.StudyonestimationofthermalprotectiveclothingbasedonhumanskinheattransfermodelJ.ChinaSafetyScienceJournal20071711135-1408.J.2002618-19ZhangFuli.MicroencapsulatedtechnologyanditsapplicationinprotectiveclothingJ.ChinaPersonalProtectionEquipment2002618-199.J.2005266825-830ZhangHaifengGeXinshiYeHong.CharacteristicsoftheheatchargeanddischargeoftheencapsulatedphasechangematerialsJ.ActaEnergySolarisSinica2005266825-83010ZhuFanglongMaSuqinZhangWeiyuan.StudyofskinmodelandgeometryeffectsonthermalperformanceofthermalprotectivefabricsJ.HeatandMassTransfer200845199-10511HenriquesFCJr.StudiedofthermalinjuriesV.ThepredictabilityandthesignificanceofthermallyinducedrateprocessesleadingtoirreversibleepidermalinjuryJ.ArchPathol194743489-50212.J.2006347928-932ZhangDongZhouJianminWuKeru.TemperaturemodelofphasechangeprocessofphasechangematerialJ.JournalofTongjiUniversityNaturalScience2006347928-932246Vol.19NumericalSimulationofHeatTransferforThermalProtectiveClothingIncorporatingPhaseChangeMaterialLayerZHUFanglongFashionInstituteZhongyuanUniversityofTechnologyZhengzhou450007ChinaAbstractPhase-changematerialsPCMscanbeusedtoreducethermalstressandimprovethermalcomfortforworkerswearingthermalprotectiveclothingunderfire.InthispaperanumericalmodelisdevelopedwhichinvestigatesheattransferwithinprotectiveclothingsystemcoupledwithPCMlayerwhensuddenlyexposedtoconvectiveandradiantheatfluxfromsimulatedpre-flashoverfireradiation.Thesimulationresultsarevalidatedbytheexperimentalvaluesconductedintheapparatusforevaluatingthermalprotectiveperformanceandthecomputerresultsagreedwellwiththeexperimentalvalues.TherelationsamongprotectiveperformanceandmeltingpointconfigurationofPCMlayerintheprotectiveclothingarealsoinvestigatedbythemodelresults.ItwasfoundthatPCMhaveapositiveeffectonheatprotectioncomparedwiththefireprotectiveclothingcommonlyused.HowevertheefficiencyofprotectionforhumanskinburninjurydependsonthelocationandthethermalpropertiesofPCMlayer.Keywordsthermalprotectiveperformancephasechangematerialskinburnprotectiveclothing346No.4
本文标题:附加相变材料层的热防护服装传热数值模拟
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