预览加载中，请您耐心等待几秒...

基于CFD对公路隧道纵向射流通风系统的研究.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

基于CFD对公路隧道纵向射流通风系统的研究 Title:ResearchonLongitudinalJetVentilationSysteminHighwayTunnelsUsingComputationalFluidDynamics(CFD) Abstract: Publicsafetyandthecomfortoftravelersareofprimaryconcerninthedesignandoperationofhighwaytunnels.Adequateventilationsystemsarevitaltoremovepollutants,smoke,andheatgeneratedbyvehiclesinthetunnels.ThispaperaimstoinvestigatetheapplicationofComputationalFluidDynamics(CFD)instudyingtheeffectivenessoflongitudinaljetventilationsystemsinhighwaytunnels.TheCFDsimulationresultswillprovidevaluableinsightsintooptimizingthedesignandoperationofventilationsystemsforenhancedtunnelairqualityandfiresafety. 1.Introduction: Highwaytunnelsareanessentialpartofmoderntransportationinfrastructure,ensuringefficientroadconnectivityandsafepassageforvehicles.Properventilationplaysacrucialroleinmaintainingairquality,preventingaccumulationofpollutants,removingsmokeincaseoffire,andprovidingacomfortableenvironmentforbothdriversandpassengers.Longitudinaljetventilationsystems,whichintroducefreshairthroughjetfansalongthetunnel,havebeenwidelyadoptedduetotheireffectivenessinachievingsafeandefficienttunnelventilation.ThisresearchutilizesCFDtechniquestoevaluatetheefficiencyofsuchsystems. 2.Methodology: 2.1.DevelopmentofComputationalModel: A3DnumericalmodelofahighwaytunnelequippedwithlongitudinaljetventilationisconstructedusingcommercialCFDsoftware.Themodelincludesrealisticgeometryofthetunnel,roadsurface,andvehicles.Jetfans,airinlets,andsmokeventsareincorporatedintothemodel. 2.2.GoverningEquationsandAssumptions: TheNavier-Stokesequations,incorporatingtheeffectsofturbulence,heattransfer,andspeciestransport,aresolvednumericallytoobtainairvelocity,pressure,temperature,andpollutantconcentrationdistributionsinsidethetunnel.Thestandardk-epsilonturbulencemodelisemployed. 2.3.BoundaryConditions: Boundaryconditions,includingroadtrafficflowrate,jetfancharacteristics,andairinletvelocities,aredefinedbasedonreal-worldoperatingconditions.Theeffectsofdifferentvehiclespeeds,trafficvolumes,andpo