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1、thevelocityfieldinsideJLR,andcomparedwithexperimentalvaIue.foundthatstandardk一£modelbetterageedwithexperimentalvaluebest.Standat’dk-。modelwasadoptedtOsunulatcvelocit},andpressLu℃field,turbulentkineticenel’gy,internalandextel·nalcirculationratioLlnderdifferentnozzleradius,
2、dfiferentpositionswitlllli1nOZzleJLR.Byanalyzingresults,theoptimalnozzleradiusandoptunalnozzlepositionwereselected.Theoptimalnozzlepositionwas40toni,ro/h【)equal0.08wasoptinlalnozzle1.a(chǎn)diuspal’anletersInliquid—solidtwo—phasesimulation,DPMmodelwaschosenMultiphasemodelwasset
3、011basisofturbulentsimLllation.Thedistr沁utionandmotionofsolidparticlesinloopreactol·、、,ass110u.11Particleresidencetimeunderdifferentspeedsandparticleresidencetimeofdifferentparticlediameterwerecalculated.Usingmixturemodel,pattic1esolidcontentratewascalculatedThestudyprovi
4、dedtheorybasisfordesigningandmagmifyingJLRbycalculatingandanalyzingvelocityfield,JLRinsidepressurefield.a(chǎn)ndturbulentkineticenergy,internalandextel’nalcirculationratio.KEYWORDS:JLR,thespeeddistribution,nozzleradiUS,nozzleposition,solidcontentrat\浙江工業(yè)大學(xué)碩zk-i侖文摘要????????????
5、ABSTRACT.....................................第1章緒論?????????1.1研究背景及意義??????.1.2噴射環(huán)流反應(yīng)器研究現(xiàn)狀???1.2.1噴射環(huán)流反應(yīng)器結(jié)構(gòu)的研究1.2.2JLR噴嘴研究進(jìn)展?????1.3液速對固體顆粒運(yùn)動情況的影響目錄1.4環(huán)流反應(yīng)器的應(yīng)用?????????????????????????一61.5計算流體力學(xué)(CFD)1.5.1CFD介紹????.1.5.2FLUENT概述1.5.3GAMBIT簡介1.5.4Tecplot簡介?????1.6CFD在化工過程中
6、的應(yīng)用..1.7研究內(nèi)容???????第2章JLR數(shù)值模擬理論基礎(chǔ)2.1數(shù)值模擬的控制方程??.2.1.1質(zhì)量守恒方程????.2.1.2動量方程控制方程2.1.3能量方程???..2.2湍流模型????.2.2.1標(biāo)準(zhǔn)k一£模型??2.2.2RNGk-z模型??2.2.3Realizablek-z模型2.2.4RSM模型???2.3多相模型的選擇?.2.3.1歐拉一拉格朗日方法.2.3.2歐拉一歐拉方法??2.33流體體積模型(VOF)V79JH●●235O03456789{;}2.3.5歐拉模型?????????2.4M從?Ifc模型
7、的概述???????2.4.1局限性?????????.2.4.2混合模型求解方程???????第3童實驗部分3.1實驗裝置???????????3.1.1上噴式環(huán)流反應(yīng)器??????3.1.2實驗介質(zhì)???????????.3.1.3實驗流程???????????.3.2流速檢測方法???????..一3.2.1液速測量原理?????????.3.2.7電容式微差壓變送器原理?????3.3實驗儀器???????????.3.4實驗方案與步驟?????????.3.4.1實驗方案???????????.3.42實驗步驟????????3
8、.5模擬模型的建立?????????..3.5.1幾何模型???????????.3.5.2網(wǎng)格劃分及策略?????????3.5.3網(wǎng)格無關(guān)性驗證?????????3.5.4湍流模型的初步選