湍流液-液分散體系中液滴聚并過程的研究.pdf

1、大連理工大學碩士學位論文湍流液液分散體系中液滴聚并過程的研究姓名：于水波申請學位級別：碩士專業(yè)：化學工程指導教師：趙宗昌20080609湍流液一液分散體系中液滴聚_斤過程的研究TheStudyofDropCoalescenceintheLiquid—LiquidTurbulentDispersionsAbstractIntheturbulentstabilizedliquidliquiddispersions，thebreakagean

2、dcoalescenceprocessinfluencethemasstransferreactionsratesandtheinterphaseareabetweentwophasesThestudyofdropdiametersanddistributionsinoilwaterdispersionsystemandthedropsizedistributionisoneofthecrucialaspectsinchemicalen

3、gineeringandthestudyofmultiphasefluidTheparticlesizeinoil—waterdispersionsinstirredtankistheoreticallyandexperimentallystudiedinthispaperNowMays，CoulaloglouandTavlaridesmodeliswidelyusedtocalculatethebreakageandcoalescen

4、ceprocesscoexistinginthesystemBut，sincethedispersionviscosityhasnotbeenconsideredintheCoulaloglouandTavlaridesmodel，thecalculatingresultsdifferentalotcomparedtotheexperimentaldatainsomecircumstancesThefilmsbetweenthecoal

5、escingdropsaredividedintothreetypesaccordingtothesurfacetensionexertingontheinterveningfilms，whicharefullymobile，partiallymobileandimmobileThetypeoftheinterveningfilmisusuallypredictedbeforemodelingthroughthephysicalprop

6、ertiesofthesystemThedispersionviscosityhash’tbeenconsideredinthemodelsofdropswithimmobileinterfacesincethelargedispersionviscosityCoulaloglouandTavlaridesmodelassumestheinterveningfilmsbetweencollidingdropsareimmobile，an

7、dthedropsareassumedasrigidones，whichclearlyisaweaknessToovercomethedisadvantage，theviscosityeffectoncoalescenceisfurtherconsideredinthedropdeformationandcoalescenceprocessinthepresentmodelonthebasisofCoulaloglouandTavlar

8、idesmodelInordertotestifythesolidificationofthemodifiedmodel，thepopulationbalanceequationisadoptedtocalculatetheSautermeandiametersandparticlesizedistributionsoftheexperimentsintheliteratureTheliquidparaffin—watersystemi

9、sexperimentallystudiedinthispapertotestifythemodifiedmodelTheSautermeandiametersmeasurementexperimentiscarriedoutinthetemperaturerangefrom20℃to60℃andimpellerspeedfrom200r／mintO600r／minThepicturesofthedropsaretakenbythedi