高梯度磁場中磁性可吸入顆粒物動(dòng)力學(xué)特性研究.pdf_第1頁
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1、東南大學(xué)碩士學(xué)位論文高梯度磁場中磁性可吸入顆粒物動(dòng)力學(xué)特性研究姓名:楊榮清申請學(xué)位級別:碩士專業(yè):熱能工程指導(dǎo)教師:吳新20060620東南大學(xué)碩士學(xué)位論文ABSTRACTABSTRACTThepollutionofparticulatematterwithaerodynamicdiameters101tmfPMl0)hasbeenattractingmuchattentionbo也insideoroutsideChinaTheform

2、ationmechanismandthecontr01techniquesofPMlOfromcombustionarebeingpaidmuchattentionbymoreandmorescientificresearchersThecombustionoffossilfuelsisthemainresourceofparticulatematterintheairandit’sverynecessarytostudythekine

3、ticcharacteristicofPMl0fromcombustionLotsofresearchesindicatesthatflyashfrompowerplant,whichisthemainpollutionresourcecontainsmuchmagneticmatterPMl0fromotherresourcescontainscertainmagneticmatterTheformationtheoryandcont

4、roltechniquesofPMl0fromcombustionwasbroughtinto‘973Program’byMinistryofScienceandTechnologyofPRChina,andthekineticcharacteristicofPMl0inmagneticfieldwasincludedAtestfacilitywasfoundedinthispapertomakeexperimentalresearch

5、inthecharacteristicofmagneticparticlesinhighgradientmagneticfieldSofarthere’vebeennoexperimentalmethodsfortllevisualizationofthecharacteristicofthemicrocosmicmovementofPMlOCommercialPIVtechniques(TinandDANTECetc1carlnotb

6、euseddirectlyinthistwophaseflowresearchElectricalLowPressureImpactorwasusedintheexperimentofthisPaDertomeasurethenumberconcentrationoftheparticleswithoutandwithmagneticfieldandbarattheoutletofthepassage,respectivelyFurth

7、ermore,theinfluenceofaerosolflux,magneticfluxofappliedmagnericfield,thesaturatedmagnetizationandthediameterofferromagneticwires,andthenumberoftherOWSofthebarweretakenintoaccountwhenanalyzingthemovementoft1eparticlesinhi曲

8、gradientmagneticfieldTheresultsindicatedthatdecreasingaerosolflux,improvingappliedmagneticflux,usingwireswhichhavehighersaturatedmagnetization,reducingthediametersofthewiresandincreasingthenumberofthebarwmimprovethecaptu

9、recapabilltyofthebarswhichhaveferromagneticwiresThesoftwareFemlabcalledasmultiplephysicsfieldcouplinganalysiswasusedinthisPaDertoanaIyzethemovementcharacteristicoftheferromagneticparticlesintheexperimentalsectionthrought

10、hemathematicalmodel,whichwasalsodeducedinthePaDerComputingmeshwasgenemtedbythesoftware,andunstructuredtriangularmeshwasutilizedhereLagrange—QuadraticmethodandLagrange—P:P1wereusedwhencalculatingthestaticmagneticfieldandf

11、luidfield,respectivelyVisualizationofthemagneticfield,fluidfield,particlefieldwascarriedoutaccordingtothenumericalsimulaCionAnditmadeuptheshortageoftheexperimentinsomesenseMeanwhile,qualitativeandquantitativeanalysiswasa

12、lsomadetofindthattheresultsfrombothmathematicalsimulationandexperimentaccordedwitheachotherintendencyKEYWORDS:MagneticparticulatematterHighgradientmagneticfield,Numericalsimulation,Two—phaseflowElectricalLowPressureImpac

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