2018傳熱傳質(zhì)學(xué)年會(huì)集

（遼寧省化工資源清潔利用，大連理工大學(xué)化學(xué)工程，大連(: ,: ：擊、鋪展和脫離。Killion和Garimella[7]利用高速可視化研究了液滴生長與撞擊周期像結(jié)合圖像處理技術(shù)，首次獲得了液滴滴落過的體積演化規(guī)律，并液滴在空中應(yīng)的研究一直不足。Wang等[1011]利用注入式紅外熱示蹤方法研究了不同涂層管表面的本文利用利用紅外示蹤技術(shù)對(duì)低噴淋密度下超親水表面水平管降液膜的溫度分布表面與表W0.5研磨膏對(duì)表面進(jìn)行拋光。拋光完全后的表面，96℃NaClO2NaOHNa3PO4·12H2O和去離子水(3.75:5:10:100wt的氧化刻20min，取出后，用去離子水沖洗干凈，常溫下氮?dú)獯祾吒稍颷14]。1SEM（Quanta200,FEI,Holland）和接觸角表征圖(OCAH200,Germany0°。1SEM(b)(c)測試系統(tǒng)。實(shí)驗(yàn)系統(tǒng)分為3部分，分別為降液膜系統(tǒng)，系統(tǒng)和加熱系統(tǒng)，其流如圖2所示實(shí)驗(yàn)中流量和記錄采用帶有遠(yuǎn)能的流量計(jì)其誤差為±0.5%。溫度測量采用的銅-康銅熱電偶，校正精度為±0.05K。降液膜系統(tǒng)，包括制冷機(jī)、1T1后，2T23。經(jīng)布液器均勻分和穩(wěn)定的部件，為保證液膜的穩(wěn)定，本章采用了水槽式恒液位布液器，基本設(shè)0.960.3m[15]。 TConstantTCatch

Highspeed

T

F:Flowmeter:Valve:Solutionfluid 2Re55-88。3為不同噴淋密度下，超親水表面滴狀流溫度隨時(shí)間的演化規(guī)律。可以發(fā)現(xiàn)，滴124Re=55時(shí)，撞擊區(qū)和非撞擊區(qū)溫度的演變規(guī)律。從圖中可以看出，在液滴撞擊的整個(gè)過，非撞擊區(qū)溫度始終維持恒定，直到下一個(gè)斷轉(zhuǎn)變，其轉(zhuǎn)變周期大Re=55時(shí)約為0.1s。這種液滴的非連續(xù)撞擊帶來了液膜的劇112 (a) (b) (c)(d) (e) (f)到底部液膜的阻礙作用，產(chǎn)生的毛細(xì)波，毛細(xì)波的疊加，導(dǎo)致在液膜表面形成的波峰和波谷，從而產(chǎn)生高低相間的溫度分布。但是并沒有直接的證明來解釋5(a) (b)68所示。b)c)g)d)b)c)g)d)h)a)t=0.2683s，由于液滴撞擊產(chǎn)生的漣漪相互疊加，出現(xiàn)了兩個(gè)相對(duì)8所示，0.3K5 a) b)11結(jié)characteristicsofsandtubesprayevaporator:adetailedreview[J].AppliedThermalEngineering,Fernández-SearaJ.,Pardi?asá.á.Refrigerantfallingfilmevaporationreview:Description,fluiddynamicsandheattransfer[J].AppliedThermalEngineering,2014,64(1-2):155-171.RibatskiG.,JacobiA.M.Falling-filmevaporationonhorizontaltubes-acriticalreview[J].InternationalJournalofRefrigeration,2005,28(5):635-653.K?ro?luB.,LeeK.S.,ParkC.Nano/micro-scalesurfacemodificationsusingcopperoxidationforLeeS.,K?ro?luB.,ParkC.Experimentalinvestigationofcapillary-assistedsolutionwettingandtransferusingamicro-scale,porous-layercoatingonhorizontal-tube,falling-filmheatexchanger[J].InternationalJournalofRefrigeration,2012,35(4):1176-1187.HuX.,JacobiA.M.Departure-sitespacingforliquiddropletsandjetsfallinginthin-filmheatexchangers:UniversityofIllinois1997.KillionJ.D.,GarimellaS.Gravity-drivenflowofliquidfianddropletsinhorizontaltubebanks[J].InternationalJournalofRefrigeration,2003,26(5):516-526.KillionJ.D.,GarimellaS.Pendantdropletmotionforabsorptiononhorizontaltubebanks[J].InternationalJournalofHeat&MassTransfer,2004,47(19):4403-4414.BustamanteJ.G.,GarimellaS.Dominantflowmechanismsinfalling-filmanddroplet-modeevaporationoverhorizontalrectangulartubebanks[J].InternationalJournalofRefrigeration,2014,43(4):80-89.WangQ.,MaX.,ZhongL.,etal.HeatTransferCharacteristicsofFallingFilmProcessonCoatedDivisionTubes:EffectoftheSurfaceConfigurations[J].Industrial&EngineeringChemistryResearch,WangQ.,MaX.,LanZ.,etal.Experimentalstudyonmixingeffectoffallingfilmoncoateddivisiontubebythermaltracingtechnique[J].ExperimentalThermal&FluidScience,2012,38(1):165-170.ZhangF.,PengJ.,GengJ.,etal.Thermalimagingstudyonthesurfacewaveofheatedfallingliquidfi[J].ExperimentalThermalandFluidScience,2009,33(3):424-430.InternationalJournalofMultiphaseFlow,2008,34(1):13-28.ZhengY.,MaX.,LiY.,etal.Experimentalstudyoffallingfilmevaporationheattransferonsuperhydrophilichorizontal-tubesatlowspraydensity[J].AppliedThermalEngineering,2016,111.ZhengY.,LanZ.,CaoK.,etal.