水中气泡运动规律的piv实验分析

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1、ABSⅡ乙气CTTitle：EXPERIMENTALSTUDYONMOTIONRULEOFBUBBLEIN、^馏汀ERBYPIVTECHNIQUES‘Major：HydraulicsandRiverDynamicsName：BAIYunyanSupervisor-PrOf_CHENGangLect．SHAOJianbinABSTRACTsignature．匦迤墼Signature：Signature：5选!!竺!扎Theair-watertwo—phaseflowexistsinvariousfieldswidely

2、．Becauseofcomplexityoftheflowandlimitedbymeasurementmethod，theresearchofbubblesmovinginflowisstillnotdeep．Avoidingthecomplexfactorsaswalleffectandimpactofbubbles，theexperimentalmethodofsinglebubblerisinginstillwateristheidealresearchwayofaerationflow,whichwillb

3、eareferenceforstudyingaerationflow．Thepresentpaperreportsallexperimentalstudyonbubblere{gularityrisinginawatercolumnandogee—sectioninspillwaytunnelbyPI＼7techniquesandimageprocessingtechnology．Themaincontentsandconclusionsaleasfollows：(1)TheapplicationofPIVtechn

4、iquesinobtainingbubbleparameterwassummarized、suchasbubblesize，shape(aspectratio)，trajector3；velocit．v,acceleration，piezometric1ineandSOon．(2)Aexperimentalapparatusandschemewhichcangeneratebubbleswithdifferentsizeandindependentweredesigned．UsingPIVmeasurementtec

5、hniquetoobtainmotionparametersofsinglebubble，suchasthebubblecharacteristicsize，instantaneousvelocityandtrajectory．Finall35severalclearanddetailedexperimentalconclusioswerepresentedwhichwouldprovidreferencesforfurtherexperimentalornumericalstud3i(3)Theobservatio

6、nanddescriptionofaspectratioofsub—millimeterbubblerisinginstillwaterwasrealized．Thecriticaldiameterwhichshouldconsidertheinfluenceofbubble：Sshapewasintherangeof以。=0．5mm--一lmm．(4)Theregularib，oftheradialinstantaneousvelocityofbubblesrisinginstillwaterwassummariz

7、ed．ItwasreportedthatinstantaneousvelocitycurvesanddeformationCUI'Ves’Thestud，’isfinanciall3’supportedb3’theNationalNaturalScienceFoundationofChina(50579085)锄dthePh．D．ProgramsFoundationofMinislr3rofEducationofChina(-No．20060700001)㈠㈠制引—∽，媳。Ⅶ_可{卜{．瓤引西安理工大学硕士学位论文w

8、erewelIlinearrelatedlyas∥2一rinthecertainrange．(5)Thebubblediameterofd叩=1．7ram"---2mm(Eo=0．4"---0，6、Re=650～750)wasproposedastheinflexionofterminalvelocity,．Availablecorrelati