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1、SimulationofsmokeflowandlongitudinalventilationintunnelfireSciencePressAvailableonlineatwww.sciencedirect.corn●o-lEHo暑o-IEoT'Trans.NonferrousMet.Soc.China16(2006)741—746TransacfiONSOfNonferrousMetaisSocietyofChinaWWW.CSU.edu.cn/ysxb/SimulationofsmokeflowandlongitudinalventilationintunnelfireYANGG
2、ao-shang(~j高尚),ANYong-lin(~永林),PENGLi-lnin(彭立敏),ZHANG血.hua(张进华)1.SchoolofCivilEngineeringandArchitecture,CentralSouthUniversity,Changsha410075,China;2.HunanProvinceCommunicationPlanningSurveyandDesignInstitute,Changsha410008,ChinaReceived20August2005;accepted18March2006Abstract:Understandingthech
3、aracteristicsofsmokeflowintunnelfireisveryimportantfortunnelsafetyThecharacteristicsoftunnelfirewereanalyzed.ThesmokedevelopmentindifferentsituationsofanengineeringexamplewassimulatedusingcommercialCFDsoftwarePHOENICS3.5byfieldmodelingmethod.Thespreadingrulesandcharacteristicsofconcentrationfield
4、andtemperaturefieldofsmokeflow,tIldifferentlongitudinalventilationspeedswerestudied,whichmayprovidethetheoreticalbackgroundforevacuationdesignintunnelfire.Theeffectivemeasuresoffirerescueandcrowdevacuationwerealsodescribed.Keywords:tunnelsafety;tunnelfire;smokeflow;longitudinalventilation;simulat
5、ion1IntroductionThetumlelisoneoftheimportantfacilitiesofrailroadandhighwaytransportation,andalsoathroatofrailroadandhighway.Withthedevelopmentoftransportation,therearemoreandmoretunnels.Althoughthetunnelfireoccursseldom.butthepotentialdangeroflifesafetyistremendousonceafireoccursintunne1.Thetunne
6、lfirehassomecharacteristiessuchastheburnableconditioniscomplicated,thefirespreadsquickly,thehotsmokeexpelshardly,thefirecaloriesconcentrate,theheatdispelsslowly,andthetemperatureofaircurrentincreasesveryquickly.Additionally,thenarrowandenclosedspecialconstructioninsidethetunnelleadstothevehiclean
7、dpersonneltoevacuatehardly.Usually,thescopeinvolvedinthefireisverylargoandthelOSSofeconomyandpersonnelareheavyoncetheflreoccurs.Inthelast30years.manytunnelfiresoccurredaroundtheworld『l,21,whichhavealreadyattractedthere
