广州地铁区间隧道火灾烟气流动及通风方式的研究

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1、广州大学硕士学位论文广州地铁区间隧道火灾烟气流动及通风方式的研究姓名：赵成军申请学位级别：硕士专业：暖通空调指导教师：周孝清20070501英文摘要TakingacertaincommonlylongtunnelandacertainspeciallylongoneofGuangzhouMetroasresearchrepresentatives，studyseveralcontentsasfollowing：thepressuredistributionandvelocityvaluesofpistonwindintunnelonnormalcondition；thediffere

2、nttemperature&velocitydistributionoftheheatedairatthedifferentsupplywindvelocitiesintunnelonobstructioncondition，gaintheoptimalsupplywindvelocity,whichcanguaranteetheairconditionersabovetraintoworknormallyandeconomically；onthefireconditionintunnel，introducethecharacterofsmokeflowingintunnel，and

3、utilizePHOENICSsimulationsoftwaretosimulatefivedifferentfiresituations，andputforwardcorrespondingventilationmeasuresandpassengerevacuationmeasuresbasedonthesimulationresults．Atlast，setupareducedscalemodeltunnelaccordingtoresembletheorytovalidatethecorrectnessofPHOENICSsimulationresultsbythecomp

4、arisonbetweentheexperimentalpictureandthesimulationpictures．Researchresultsshowthat：Onthenormalcondition，thepistonwindvelocityinboththecommonlylongtunnelandspeciallylongtunnelisabout40％oftrainrunningvelocity．Thepistonwindvelocityinvolveswiththetrainvelocity、tunnellength、tunnelsection-crossingar

5、ea，trainsection—crossingarea，obstructionrate，coarsenessoftunnelwallandtrainsurface．Whentrainrunningathighspeed(exceeding100kra／h)intunnel，pressurefluctuationratiowillexceedthestandardatsomespecialzone，suchasthewindwellatthemiddleoftunnelandtherapidlychangedsection—crossingintunnel，whichwillc,au

6、setherapidlychangedwindpressure，andcausethepassengers’earache．Ontheobstructioncondition，thetrainandpassengersgiveoutheat，whichheattheairintunnelcontinuously-Thehightemperatureairwillaffectthenormalworkofairconditionersontrain．SoitisnecessaryandimportanttosupplytheoutsidefreshIII广州人学硬17学位论文airin

7、totunneltotakeawaytheextraheatandguaranteetheairconditionersworknormally．PHOENICSsimulationresultsshowthat8m／sistheoptimalsupplyairvelocity,whichisnotonlyeconomical，butalsopractical．Onthefirecondition，basedontheHearReleaseRatefliR