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1、第24卷第2期高?；瘜W工程學報No.2Vol.242010年4月JournalofChemicalEngineeringofChineseUniversitiesApr.2010文章編號：1003-9015(2010)02-0340-06簾式折流片換熱器強化傳熱數(shù)值研究1112古新,董其伍,劉敏珊,周雅寧(1.鄭州大學河南省過程傳熱與節(jié)能重點實驗室,河南鄭州4500022.鄭州煙草研究院,河南鄭州450001)摘要：為解決折流板換熱器殼程流體阻力過大和折流桿換熱器低Re下傳熱系數(shù)較小等管殼式換熱器的不
2、足，提出了殼程流體“斜向流”的新概念，研制了新型高效節(jié)能管殼式換熱器?簾式折流片換熱器，其殼程傳熱系數(shù)高于折流桿換熱器20％~30％，而殼程壓力損失大幅低于折流板換熱器。以場協(xié)同原理分析了斜向流的強化傳熱機理，指出在簾式折流片換熱器殼程中流體速度場與溫度梯度場間的夾角小于折流桿換熱器，是其強化傳熱的重要原因。對簾式折流片換熱器中折流柵間距、折流片傾角、折流片寬度等重要幾何參數(shù)對傳熱和壓降的影響規(guī)律進行了數(shù)值模擬研究，并據(jù)此推導了殼程傳熱系數(shù)和流體阻力降準數(shù)關(guān)聯(lián)式，為其工程設計和推廣應用提供了參考依據(jù)。
3、關(guān)鍵詞：管殼式換熱器；強化傳熱;；折流片；斜向流；場協(xié)同中圖分類號：TQ051.5；TK124文獻標識碼：ANumericalResearchonHeatTransferEnhancementofShutterBaffleHeatExchanger1112GUXin,DONGQi-wu,LIUMin-shan,ZHOUYa-ning(1.KeyLaboratoryofProcessHeatTransferandEnergySavingofHenanProv.,ZhengzhouUniversity,Z
4、hengzhou450002,China;2.ZhengzhouTobaccoResearchInstitute,Zhengzhou450001,China)Abstract:Inordertoovercomesomedisadvantagesofshell-and-tubeheatexchanger,suchasthetoohighpressuredropinshellsideofsegmentalbaffleheatexchanger,andthelowheattransfercoefficien
5、tinrodbaffleheatexchangerwiththelowReconditioninshellside,anewconceptof“SidelingFlow”inshellsideofshell-and-tubeheatexchangerwaspresented,andanewstyleenergysavingshell-and-tubeheatexchanger,shutterbaffleheatexchanger,wasdeveloped.Theheattransfercoeffici
6、entinshellsideofshutterbaffleheatexchangeris20％~30％higherthanthatofrodbaffleheatexchanger,andthepressuredropinshellsideismuchlowerthanthatofsegmentalbaffleheatexchanger.TheFieldSynergyPrinciplewasadoptedtoanalyzetheheattransferenhancementmechanismofside
7、lingflow,itindicatesthatthesynergyanglebetweentheflowvelocityfieldandtemperaturegradsfieldaroundthetubesinshutterbaffleheatexchangerissmallerthanthatinrodbaffleheatexchanger,whichisthemaincauseofheattransferenhancementinshutterbaffleheatexchanger.Effect
8、sofsomeimportantstructuralparameters,suchasthedistancebetweentwoadjacentshutterbaffles,inclinationangleofstrips,widthofstripsandsoon,onthefluidflowandheattransferperformanceofshutterbaffleheatexchangerwerealsoinvestigatedbynumeri
