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1、第24卷第2期高校化学工程学报No.2Vol.242010年4月JournalofChemicalEngineeringofChineseUniversitiesApr.2010文章编号：1003-9015(2010)02-0340-06帘式折流片换热器强化传热数值研究1112古新,董其伍,刘敏珊,周雅宁(1.郑州大学河南省过程传热与节能重点实验室,河南郑州4500022.郑州烟草研究院,河南郑州450001)摘要：为解决折流板换热器壳程流体阻力过大和折流杆换热器低Re下传热系数较小等管壳式换热器的不
2、足，提出了壳程流体“斜向流”的新概念，研制了新型高效节能管壳式换热器⎯帘式折流片换热器，其壳程传热系数高于折流杆换热器20％~30％，而壳程压力损失大幅低于折流板换热器。以场协同原理分析了斜向流的强化传热机理，指出在帘式折流片换热器壳程中流体速度场与温度梯度场间的夹角小于折流杆换热器，是其强化传热的重要原因。对帘式折流片换热器中折流栅间距、折流片倾角、折流片宽度等重要几何参数对传热和压降的影响规律进行了数值模拟研究，并据此推导了壳程传热系数和流体阻力降准数关联式，为其工程设计和推广应用提供了参考依据。
3、关键词：管壳式换热器；强化传热;；折流片；斜向流；场协同中图分类号：TQ051.5；TK124文献标识码：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
