119室内3种送风方式下人体气溶胶颗粒数值模拟冯国会明月兰信颖等

20141301JournalofShenyangJianzhuUniversityNaturalScienceJan．2014Vol．30No．12011－12－1051378318LT2013013F11－264－1－171964—．2095－1922201401－0131－06doi10．11717/j．issn2095－1922．2014．01．203110168探讨空调房间不同气流组织形式下，人体持续说话散发气溶胶颗粒污染物的运动分布规律，探求空调房间合理的气流组织形式．运用CFD—fluent6.2模拟软件对空调房间上送下回、顶送下回及下送顶回3种送风方式进行模拟研究．分析不同送风方式下人体散发气溶胶颗粒的质量浓度分布及传播距离，房间换气次数对气溶胶污染物的质量浓度影响．顶送下回送风方式5次/h换气时气溶胶颗粒运动距离为1.5m，而10次/h换气时气溶胶颗粒运动距离为1.0m．相同换气次数下，顶送下回送风方式室内空气质量较佳．随着换气次数的增加，室内同一位置污染质量浓度降低，颗粒物传播范围减小．对于顶送下回送风方式增大换气次数不能降低人体感染风险．TU111．4+5X51ATheNumericalSimulationofHumanAerosolParticlesunderThreeAirSupplyMethodsinＲoomFENGGuohuiMINGYueLANXinYingZHANGYiLIHuixingSchoolofMunicipalandEnvironmentalEngineeringShenyangJianzhuUniversityShenyangChina110168AbstractExploredifferentairfloworganizationforminairconditioningroomthehumanbodyspeakingsprayaerosolparticlesthemovementofaerosolparticlescontaminantdistributionsearchforreasonableairorganizationform．UsingCFD-fluent6.2simulationsoftwaretosimulateairflowinaconditioningroomunderthreeventilationmethodsupsupplyanddownreturntopsupplyanddownreturnanddownsupplyandtopreturn．Analysisoftheconcentrationanddistributionaroundhumanbodyaerosolparticlesunderdif-ferentairsuppliedwayandtheroomairchangerateaccordingtoaerosolpollutantsconcentrationeffects．Whenairchangrateis5/htheaerosolparticlesmovementdistanceis1．5mandairchangerate10/htheaerosolparticlesmovementdistance1．0m．Atthesameairchangratetopsupplyanddownreturnthewayofventilationgivesindoorairqualitybetter．Alongwiththeincreaseofairchangeratethesamepositionin-doorairpollutionconcentrationandtheparticletransmissionrangereduced．Increasingairchangerateinthetopsupplyanddownreturnwaycannotreducethehumanbodyinfectionrisk．KeywordsairorganizationhumanaerosolparticlesconcentrationnumericalsimulationGDP3%～6%113230．2－7．、、、8－1011．CFD—fluent6．2．11.1、、．ρt+divρu=divΓgrad+S．1φρuГS．1.2Lagrange13－15Fi=dupidt．2upiiFiiFi=Fd+G+Fai．3FdGFai．16．22.1500cm×400cm×300cm1．0.2m×0.6m×1.5m0.2m×0.2m×0.2m．31231．2．3．1．2．3．4．5．6．。1Fig.1Airconditioningroomphysicalmodel13Table1Threekindsofairdistributionmode、2Table2Tuyereconfiguration×/cm40×4040×4060×1060×10、、60×10、、3Table3Simulationconditions/·h/℃×/m/m·s－115210．6×0．11．385210．4×0．40．52210210．6×0．12．7810210．4×0．41．042.2velocity-inlet13133outflow．．24℃．1μm2m/s0.085μm/s17．2cm×2cm．“”trap．33.112y=200cm．21Fig.2Case1theupsupplyanddownreturnsectionsimulationresults2a．2b．3y=200cm．31Fig.3Case1thetopsupplyanddownreturnsectionsimulationresults3a．3b0.5m134300.5m．4y=200cm．41Fig.4Case1thedownsupplyandtopreturnsectionsimulationresults4a．4b“”1.5m．3.2125、673y=200cmx．x0～500cmkg/m3．10/h5．3m5．5/h1.5m10/h1.0m6．5/h2.5m10/h2m7．．5Fig.5Theupsupplyanddownreturnsectionconcentrationdistributioncomparisonintwocases131356Fig.6Thetopsupplyanddownreturnsectionconcentrationdistributioncomparisonintwocases7Fig.7Thedownsupplyandtopreturnsectionconcentrationdistributioncomparisonintwocases3.3“”18．εe=CrCi．4εeCrCi．5A210200150B230200150C250200150D300200150E400200150．4．AE．CDD．5/hA、B、C10/h．4Table4TheupsupplyanddownreturnhumanexposureindexABCDE10．03780．10530．1622415．68－20．04540．12140．2426335．06－5．C、D、Ex=250C～E．AB．10/h5/h．136305Table5ThetopsupplyanddownreturnhumanexposureindexABCDE10．02000．0624－－－20．01630．0484－－－6．AE．5/h10/h10/hDE．6Table6Thedownsupplyandtopreturnhumanexpo-sureindexABCDE10．00500．03530．07950．10780．227620．03370．40690．4576－－41．2．3．1．J．20061569－10．ShiPeijunLiuJingXuYaJun．Ｒegionalcompre-hensivepublicsafetymanagementmodeandChinacomprehensivepublicsafetymanagementcounter-measuresJ．JournalofNaturalDisasters20061569－10．2HuaQianYuguoLiPeterVetal．Spatialdistribu-tionofinfectionriskofSAＲStransmissioninahos-pitalwardJ．BuildingandEnvironment20094481651－1658．3SmithGJBahlJVijaykrishnaDetal．DatingtheemergenceofpandemicinfluenzavirusesJ．ProcNatlAcadSciUSA2009106711709－11712．4PeirisJSPoonLLGuanY．Emergenceofanovelswine－origininfluenzaavirusS-OIVH1N1virusinhumansJ．ClinVirol2009453169－173．5DawoodFSJainSFinelliLetal．Emergenceofano-velswine-origininfluenzaAH1N1virusinhumansJ．NEnglJMed200936062605－2615．6WongTWLeeCKTamWetal．ClusterofSAＲSamongmedicalstudentsexposedtosinglepatientJ．EmergInfectDis2004102269－276．7YuITSLiYWongTWetal．Evidenceofair-bornetransmissionofthesevereacuterespiratorysyndromevirusJ．NEnglJMed2004350171731－1739．8ChanPLYuPHFChengYWetal．Comprehen-sivecharacterizationofindoorairbornebacterialpro-fileJ．JournalofEnvironmentalSciences2009811481152．9Wong1LTMuiKWChanWY．Anenergyimpactassessmentofventilationforindoorairbornebacteriaexposureriskinair-conditionedofficesJ．BuildingandEnvironment200811431939－1944．10EvgeniaBogomolovaIrinaKirtsideli．AirbornefungiinfourstationsoftheSt．PetersburgUndergroundrailwaysystemJ．InternationalBiodeterioration＆Biodegradation2009263156－160．11NicholasP．Cheremisinoff．VentilationandindoorairqualitycontrolJ．HandbookofAirPollutionPre-ventionandControl200215188－280．12．J．200625551－75．ZhaoBin．IndoorparticlemovementanddistributionofsimulationmethodJ．BuildingVentilationandAirConditioningHeatEnergy200625551－75．13．D．2009．TianLiwei．Indoorenvironmentparticleconcentra-tionpredictionmodelandp