幂律流体偏心环空螺旋流紊流的PIV实验研究

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1、大庆石油学院硕士研究生学位论文ExperimentalStudyonTheHelicalTurbulentFlowofPowerLawFluidinEccentricAnnuluswithPIVTechnologyAbstractInoilindustry,thehelicalflowofpowerlawfluidineccentricannulusisextremelycommen．turbulentflowisoneofthemostcommonflowconditions．Generally,inoi

2、lwelldrilling．theflowofdrillfluidindrillpipeanddrillcollaristurbulentflOW,fortheflowofdrillfluidinannulus，sometimesitislaminarflowandsometimesitisturbulentflow．Withthedevelopmentofscienceandtherequestofprojectapplication，itgreatlyacceleratedtheprogressoftu

3、rbulentresearch，butturbulentflowitselfisanextremelycomplexflowconditionwithstrongrandomness．conspired、vitllthenonlinearofpowerlawparcem，theasymmetryofeccentricannulus，thecomplexityofhelicalflowandthelimitationsofflowfield’Stestingtechnology,SOfar,nobodyhas

4、researchedthehelicalturbulentflowofpowerlawfluidineccentricannulus，somerelevantprojectproblemsarestillhardresolved．TheadventofPIVtechnologyprovidedUSwitllmoreefficientmeansforunderstandingtheinnersituationofflowfieldthoroughly,SOthispaperdevelopedexperimen

5、talstudyonthehelicalturbulentflowofpowerlawfluidineccenmcannuluswithPIVTechnology．Inviewoftheresearchsubject，thispaperestablishedasetofdeviceofverticalannuluspipelinethattheeccentricityWasadjustable．toresearchhelicalturbulentflowlawofpowerlawfluidinannulus

6、line．PIVexperimentsofwaterandpolymerwatersolutionwerecarriedoutseparately,obtainedvelocityvector，flowline，velocitycontourandsituationofaxialvelocitydistributioninannuluswheninnertubeismotionlessandcicling．Establishedanewdiscriminantmethodofflowpanem—byvelo

7、citycontours，andanalysedaffectingfactorsandaffectinglawsofaxialvelocitydistribution，pressuregradientandflowcondition，discoveredfeaturesandoccuringprocessofhelicalturbulentflowofpowerlawfluidineccentricannulusfromvelocitycontours．Thispaperprovedthefeasibili

8、tyofPWtechnologyfortheresearchofhelicalturbulentflowofpowerlawfluidineccentricannulus，theviewisproposedinnovately,suppliedthinkingforexperimentalstudyofotherfluid’Sflowlaw,theexperimentalresultsofthispaperwil