大型地铁换乘站火灾烟气扩散特性及疏散的研究

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1、北京工业大学硕士学位论文大型地铁换乘站火灾烟气扩散特性及疏散的研究姓名：侯丛兰申请学位级别：硕士专业：供热、供燃气、通风及空调工程指导教师：李炎锋20090501AbstractAlong、析t11thebuildingofsubwaylines．moreandmorecomplicatedtransferstationscomeup．Asallindispensabletraffictool，subwayplaysamoreandmoreimportantroleinourmodemlife．Itprovidespeopleconvenienceth

2、atCan’tbereplacedbyothertraffictools．Moreover,transferstationisajunctionofthesubwayline’Snet，andthepassagesaretheonlywaytooutside，andthepassagesaremorecomplicated，passengersaremorecrowdedandconcentrated，onceonfire，thedirectionofpeopleevacuationisthesameasthedirectionofsmokediffu

3、sion，bothofwhicharefromundergroundtooutdoortheegressesforpeopletoevacuatearealsoonestospraysmoke．thediffusionof11ightemperaturesmokenotonlydevotetoallthethingsfire，butalsodecreasethevisibilityofthealleyway,anditwillaffecttheevacuationandfireman’Sfirefighting，anditwillcauseveryse

4、riouspeoplecasualty．Compared、^，i也onlyonestation,itismoredangerous．Itisverysignificanttostudysmokediffusioninsubway·transferstation．Inthispaper,thestudysubjectisDongZhimentransferstation．UsingsoftwareCFXoffieldmodelsimulatessituationofsmokediffusiononlyusingstationOWllexhaustsmok

5、esystemwhenthemiddleofstationplatformorthemiddleofthehallisonfire．CFXcandescribethesmokespreadprocessvividly．Moreover,CFXtakesfilelcombustionprocessandradiationeffectintoaccountanditCansimulateallkindsofhannfiflsmokecomponentsandconcentrationofsmoke．Thenwecanknowallthefatalnesso

6、fthefire．Analyzingthesimulationofthefireinheatreleaserate5MWandonlyusingstationownexhaustsmokesystem．Wecanestimatethepathtoevacuate，andanalyzethetimeofthefourdangers’coming，includingthetemperaturedangers’comingtimeintwosafetyheightsthevisibilitydangers’comingtimeandtheconcentrat

7、ionofCOdangers’comingtimethenfindtheshortesttimeandgaintheAvailableSafeEgress"time(ASET)，andanalyzetheaffectionoftheevacuationbythesmoke．TheevacuationsoftwareSTEPSiSahighlyeffectivethreedimensionalsoftware．DesignedbyMottMacDonald．TllispaperusingSTEPSsimulatetheevacuatetime．Eachh

8、allofstationhas100people．Eachinsularstationhas5