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1、萬方數(shù)據(jù)第32卷第26期中2012年9月15日國電機(jī)工程學(xué)報ProceedingsoftheCSEEV01．32No．26Sep15，2012◎2012Chin．Soc．forElec．Eng．37文章編號：0258—8013(2012)26一0037—06中圖分類號：x511文獻(xiàn)標(biāo)志碼：A學(xué)科分類號：470·20尿素水溶液霧化熱分解特性的建模及模擬研究周英貴，金保異(東南大學(xué)能源與環(huán)境學(xué)院，江蘇省南京市210096)SimulationandModelingonT且ermalDecompositionCharacteristicsofU
2、rea—Wate卜SolutionAtomizationZHOUYinggui，J【NBaosheng(schoolofEnergyandEnvirolllllent，southeastUniVersi吼Nanjing210096，JiangsuPmVince，China)ABSTRACT：N啪encalstudyandmodellngoftheevaporationa11dthemaldecompositioncharacteristicsofurea—water_solution(uwS)dmpletinhi曲tempemtLlrea
3、irwasconductedbasedonFluentplatfom．Theevaporationofwaterfromasin91edropletofureawatersolutionwasinVestigatedtheoreticaIIybyarapidmixing(RM)modeI，whichalsoconsidersdropletmotionandvari{lblepropeniesofthes01ution．TheureawaterdropletsweretreatedwithLagrangeparticletrackingmo
4、del，assumingakineticratede—volatilizationanddecompositionmodelofureaaRertheevaporationofpurewater．Be船eendfoplets孤dgasphasetwo·waycouplingwasconsideredformomentum，massandheat．Itisfoundthatthetemperaturewindowisdependentontheliquidnow，anddropletsizeforgiVennozzlehas伊eatinnu
5、enceontheevaporationandthennaldecompositionofurea．wate卜s01utionfUWSl．At406KmostofthewaterofUwSdr叩letsarealreadyeVaporatedandureabeginsthennaldecompositionstepbyst叩．ConVersionrateofNH3increaseswithtemperatureandresidencetimeincreasing，andachieVesagoodthemlaldecOmpositionra
6、teatabove650KandureaistransformedcompletelyintoNH3．Betweentherangeof700Kand735K，thesimulationresultsshowt11at02oxidizespartofurea’sthemlaldecompositiongasestoNOund盯hightemperature，ka(1dmon，thecalculationresultwascomparedwiththeexperimentaldatameasured，toguarantee也ereliabi
7、lityoftheconclusiondrawnfrommisnumericalstudy．KEYWoI①S：urea-wat*sol嘶on；thenn“decomposmon；NH3；conversionrate摘要：基于FLUENT平臺對尿素水溶液(urea-water．s01ution，uws)液滴的蒸發(fā)和熱分解特性進(jìn)行建模和數(shù)值模擬研究。對單個尿素水溶液液滴采用快速混合模型(rapidmixingmodel，RM)模擬液滴蒸發(fā)，并考慮運動和變化特性，對尿基金項目：國家自然科學(xué)基金項目(51076029)。TheNationalNa
8、tIlralScienceFundofChina(51076029)素水溶液液滴采用拉格朗日軌道模型跟蹤：同時建立液滴的化學(xué)動力學(xué)模型，液滴與氣相兩相耦合之問考慮了動量、質(zhì)量和熱量，研究發(fā)現(xiàn)溫
