垂向密度變化的環(huán)境流體中射流特性的數(shù)值研究.pdf

1、河海大學(xué)碩士學(xué)位論文垂向密度變化的環(huán)境流體中射流特性的數(shù)值研究姓名：林偉波申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：流體力學(xué)指導(dǎo)教師：汪德?tīng)?0060501AbstractBeforethewasteWaterintrudesintotheenvironment，itsimportanttoensurethathighinitialmixingiSachieyedinthevicinityofthedischargestructurebyreleasin

2、gthecontaminatedfluidthroughorificesandintheformofbuoyantietsTherefore，accurateunderstandingandpredictionsofthebehaviourofabuoyantietanditsmixingcharacteristicsaredesiredThePapertakestheverticaldensity—stratifiedambientf

3、luidasbackground，standardtwoequationsk￡modeliSadoptedVerticaltwodimensionalbuoyantietnumericalmodelissetupFinitevolumemethodandSIl曲LEalgoritlunareusedtoobtainthesolutionofthebuoyantjetturbulentmodel111eobjectofthemodelis

4、theexperimentofbuoyantjetinlinearlydensitystratifiedwhichisdonebyDerek，RaymondandWongin1984Numericalsimulationofhofizontalbuoyantjetandverticalbuoyantietinlinearlydensitystratifiedambientfluidisperformed，andobtainedthedi

5、s砸butionofvelocity，density，dilutionandwidthofthejetThennmericalsimulationresultsarecomparedwimtestresults，andtheyareagreedwellwitheachotherThetwo—dimensionalbuoyantietturbulentmodelestablishedinthisPaperiscomparativelywe

6、llandtrulysimulatesthebehaviottrofbuoyantjetandthemixingcharacteristicsinlinearlydensity—心atifledambientfluidIt’svaluabletostudythecharacteristicsofwastewaterintrudesintothedensitystratifiedambientfluidItCallsupplyreliab

7、leanalysisdatafordesignoftheprojectofwastewaterdischargeIt’Sanimportanttechnicalmeasuretousethemethodofnumericalsimulationtostudythemixingprocedureofietsindensitys仃atifiedambientfluidKeywords：buoyantjet；numericalsimulati