NMERICALINVESTIGATIONONFLOWFIELDNEARTHEEXHAUSTOPENINGINDOOR.pdf
Airflowfieldandeffectiveregionforpollutiondischargewaspredictedaroundacircularflangedexhaustopeninginacubicroomwithoutwindow,threedifferentturbulentmodelswereemployedtosimulateairflowfieldneartheexhaustinletindoor,SIMPLEalgorithm,standardwallfunctionandpressureconditionwaschosen,andexperimentdatafromFurioCascettaatReynoldsnumber6.812×104wasselectedtoverifysimulationresults.Mainfocuswasonprofileofvelocitymagnitudeatairspeed,2m/sand0.3m/s,inaconditionaveragecross-sectionvelocityoftheexhaustopeninganddiameteroftheopeningbeing5.96m/s,0.173m,respectively.Numericalresultsshowthatairvelocitydecreasesgraduallyinradialdirectionandaxisdirectionawayfromorigin,andchangesmostdramaticallyatcorneroftheopening.Projectionofvelocitycontoursurfacesresemblesasemiellipsewithmajoraxisinradialdirectiononverticalandsymmetricalplaneatahigherairvelocity,ithoweverapproachesahemisphereofgreaterradiusgraduallywhenairvelocitydecreases;at2m/s,majoraxisoftheprojectionsemiellipsewas0.70timesthediameteroftheexhaustopening,whiletheminoraxisseemstobe0.45timesthediameterandat0.3m/s,themajoraxisoftheprojectionsemiellipsebecomes1.60timesthediameter,whileminoraxisturninginto1.55timesinverticalandsymmetricalplane;Theeffectiveregionforpollutiondischargeissimilartocontoursurfaceofvelocitymagnitude,likeasemiellipsoid,at0.3m/sairvelocity.
作者：BoYuan Chan-junMeng ChuanHe Chun-fuXi Jia-xuanLi Liang-mingPan
作者单位：KeyLaboratoryofLow-gradeEnergyUtilizationTechnologiesandSystems,ChongqingUniversity,Chongqing,400044,China;StateKeyLaboratoryofCoalMineDisasterDynamicsandControl,ChongqingUniversity,Chongqing,400044,China;PostdoctoralResearchStationofPowerEngineering&EngineeringThermophysics,ChongqingUniversity,Chongqing,400044,ChinaKeyLaboratoryofLow-gradeEnergyUtilizationTechnologiesandSystems,ChongqingUniversity,Chongqing,400044,ChinaKeyLaboratoryofLow-gradeEnergyUtilizationTechnologiesandSystems,ChongqingUniversity,Chongqing,400044,China;PostdoctoralResearchStationofPowerEngineering&EngineeringThermophysics,ChongqingUniversity,Chongqing,400044,China
母体文献：第三届中国国际透平机械学术会议论文集
会议名称：第三届中国国际透平机械学术会议
会议时间：2018年4月12日
会议地点：重庆
主办单位：中国通用机械工业协会,西安交通大学,北京化工大学,大连理工大学,《风机技术》杂志社
语种：chi
分类号：
关键词：Pollutiondischarge OpeningIndoor Flowfield Numericalsimulation
在线出版日期：2021年9月13日
基金项目：
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