The effect of fan swirl to PSU cooling英文文献资料

The effect of fan swirl to PSU cooling英文文献资料

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时间:2019-07-02

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1、TheeffectoffanswirltoPSUcoolingAuthor:Mr.JimmyLi—SeniorEngineerCompany:EmersonNetworkPowerCo.Address:No.1KefaRoad,Science&IndustryPark,NanshanDistrict,Shenzhen,ChinaZipcode:518057Phone:+86755-86011030Fax:+86755-86011064E-mail:jimmy@emersonnetwork.com.cnThee

2、ffectoffanswirltoPSUcoolingEmersonnetworkpowerco.JimmyLiAbstract:Baseonaactualcase,ThispaperuseFlothermsoftwarepackageofFlomericstoanalysistheeffectoffanswirltoPSU(PowerSupplyUnits)cooling.Throughtheanalysis,providetherelationshipbetweenthefanswirldirection

3、andflowfieldinoutlet,ThepaperalsoprovideasolutiontoavoidthiseffectinPSUthermaldesign.Keyword:FanswirlFlowfieldComponentcoolingSolution1.ForewordInelectricandelectronicindustry,forced-aircoolingapplywidelybecausetheexistenceoflotspowerdissipationcomponents.S

4、incetheproduct’scharacteristicandmainworkingenvironment,axialfanusedwidelyinforced-aircoolingscheme.Axialfanisdrivedbyamotor.Themotorrotatethefanbladeinagivenrpmbymotoritself.Withtherotationofblade,thefanprovideapressuredropbetweentwosideofblade.Andpropelth

5、eairnearbyflowsinadirectionofmotorhub.Theaxialfanhavethecharacteristicssuchaslowpressureheadandlargeflowrateetc.becausethesecharacteristicsandusuallyjustbecausethesecharacteristics,peopleusedaxialfan,andpeopleignoredmanyeffectsbringbytheswirledblades.Infact

6、airnotonlyflowsinthedirectionofhubbutalsohavethevelocityvectorinthetangentdirectionofblades.Airflowsinthedirectionofhubwithswirlactually.Intheoutletofaxialfan,airflowslikethefigshowsbelow:TangentdirectionActualflowdirectionAxialdirectionFig1Theactualflowdir

7、ectionintheoutletofaxialfanAsithassaid,theairthroughtheaxialfanflowwithswirl,.Whateffectswillappliedtotheflowfield(ThecooledareainsidethePSU)?Thispaperwilldiscussthisproblemwithaactualcase,andapplywithflothermsoftwarepackage.Describedeffectsofaxialfanswirld

8、irectionapplytotheflowfieldintheoutlet.Alsogivewaysthathowtoavoidtheseeffectoruseit!2.SimulationmodelThefigbelowarethethermaldesignsimulationmodelofPSUFig2thesimulationmodel(1)Fig3simulationmodel(2)Aft

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