水平管油水两相分散流相分布与流动特性-研究

《水平管油水两相分散流相分布与流动特性-研究》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、InvestigationonPhaseDistributionandFlowCharacteristicofOil-waterDispersedFlowinHorizontalPipeHeZhengbang(CollegeofPipelineandCivilEngineering)DirectedbyProfessorLvYulingAbstractIntheoil—watertwo—phasedispersedflow，oilandwatermixturewillexperienceaseriesofcomplexprocesses，suchasemulsif

2、ication，phasereversalandtemperaturerisecausedbyviscousenergydissipation，accordinglythephasedistributionandflowcharacteristicsaredifferentfromotherflowregimes．Inordertocomprehendtheflowbehaviorofoil-waterflowinthegeneral，themicrostructureandflowbehaviorofdropletsinoil-waterdispersedflo

3、wwerestudied．Experimentswereconductedona25．4mm，temperaturecontrolledflowloop．Bychangingthephysicalpropertiesofdifferentoilproducts，oilcontent，flowrateandtemperature，theflowprocessofoil—waterdispersedflow，dropletsizeanddistribution，pipelinepressuredropgradient，apparentviscosityofoil-wa

4、termixturewereexplored，andthechangelawofdynamicinstabilityandthermodynamicinstabilityofthedispersedsystem，whichrevealedthenatureofoil—watertwo-phaseflowinmicrocosmicaspect．Theresultsshowedthatinoil··watertwo··phasedispersedflowtheaveragedropletsizediminishedastheflowrateincreased，andg

5、rewasthetemperaturerose．Butastheoilcontentincreased，theaveragedropletsizeincreasedfirstlyandthenshrunkgradually．Afterstatisticallyanalyzingthedistributionofdropletsizeunderdifferentworkingconditions，aconclusionwasdrewthatinoil·-watertwo-·phasedispersedflowthebehaviorofdropletsizefollo

6、wedLog—Normalprobabilitystatisticsdistributionrule．Apparentviscosityofoilandwatermixtureismainlydependentonthepropertiesofoil．Theapparentviscosityofoilwithlowviscosityremainedpracticallyunchangedastheflowrateincreased，buttheapparentviscosityofoilwithhighviscositydecreasedlinearlywithi

7、ncreaseoftheflowrate．Whenthetemperaturerosetheapparentviscosityofoilalldecreased，butastheoilcontentincreasedtheapparentviscositygraduallyincreasedandthendeclinedsharplyafterapeakwasreached．AnempiricalrelationWasfittedbyanalyzingthedatagainedfromtheexperiments．11Duringthedynamicallyins

8、table