基于Fluent軟件的流化床的氣固兩相流模型研究.pdf

1、重慶大學(xué)碩士學(xué)位論文基于Fluent軟件的流化床的氣固兩相流模型研究姓名：李東耀申請學(xué)位級別：碩士專業(yè)：動力工程及工程熱物理指導(dǎo)教師：鄭忠20090601重慶火學(xué)碩十學(xué)位論文英文摘要ABSTRACTGas—solidnuidizedbedisanimportantequipmentinenergysources、chenlicalengineerin臥metallu唱y、petroleumindustriesThisnuidizedeq

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3、earsbecauseofitsbroadapplicationprospectsofit，theIIeaI_elotsofdimcultfordesigning、optimizingandmagnifyingnuidizedbedequipmentsbecauseofanunclearunderstandingofgas—solidflowlawinwhichiswithcomplexityandnonlinearinbedA2Dsi

4、nglejetbubblingfluidizedbedandairdistributorfluidizedbedwhichbotharenlledwithGeldaLrtBparticlesaretargetedasstudyobjects，baseonTwoFluidsModelandFluentCFDsoftwaretodocoldnumericalsimulationsApplicationofmultiphaseflowinFl

5、uentsoftwareandthemethodofdrawingmeshesarestudied，discreteequationsareaChieVedbyFiniteVolumeMethodTime—step、underrelaxfactorsaIldeffectofsolVerchoicearestudiedEffectofcontrolequations、closerelation、boundaryconditionofwal

6、l、themodelofgas—soliddragforceandthemodelofparticle—phaseViscosityaureaIlalyzedAnothermore，twotypesofgassoliddragfbremodelswhicharewrittenbyauthorandbasedondif詫renttheoryareinsenedinFluentsoftwarebyUDFfunctionViacomparin

7、ggassolidnoslip、gasnoslipsolidslip、gasslipsolidnoslip、gassolidslipfourschemesofwallboundaryconditionit’sfoundthatGasnoslip，solidphaseslipcaIlbebetterusedforsimulation；Thegas—soliddragforceismoreimportantthaninter—p砒icles

8、fbrceinTwoRuidsModelViacOmparingtok噸、RNGk一￡、Realizablek一￡threetypesofturbulentmodelit’sfoundthatStandardk￡turbulentmodelhasthebestimpactonsimulationthanRNGk￡andRealiz2lblek一￡turbulentmodels；ViacomparingtoGidaspow、Koch—Hi

9、ll、Di—F色licethreetypesofdragforcemodelit’sfoundthattheGidaspowmodelpe—bnnedabetterpredictable￡IbilitythanKochHill’sinOs014speriod，butalittleworsethaJlKochHill’sinO14sO20speriodDi—Felicedragforcemodelcansimulatethebubblef