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等离子体激励器控制圆柱绕流的实验研究.docx

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等离子体激励器控制圆柱绕流的实验研究 Title:ExperimentalStudyontheControlofCylinderWakeusingPlasmaActuators Abstract: Thecontrolofwakeflowaroundacircularcylinderhasattractedconsiderableattentioninresearchandengineeringapplicationsduetoitscomplexityandwidespreadindustrialsignificance.Thispaperpresentsanexperimentalstudyonutilizingplasmaactuatorsasameanstocontrolwakeflowaroundacircularcylinder.Theaimofthisstudyistoinvestigatetheeffectivenessofplasmaactuatorsinalteringthewakecharacteristicsandreducingthedragforceonthecylinder.Theexperimentalsetupinvolvesgeneratingasteadyflowaroundthecylinderinsideawindtunnelandusingplasmaactuatorstoexciteaplasmasheetnearthecylindersurface.Theflowcharacteristics,suchasthevelocityprofiles,pressuredistribution,andliftanddragforces,aremeasuredusingvarioustechniques. 1.Introduction 1.1Background 1.2Objectives 1.3Significance 2.LiteratureReview 2.1WakeFlowaroundaCylinder 2.2ControlTechniques 2.3PlasmaActuators 3.ExperimentalSetup 3.1WindTunnel 3.2CylinderModel 3.3PlasmaActuators 3.4MeasurementTechniques 4.Methodology 4.1FlowVisualization 4.2WakeFlowCharacterizationwithoutPlasmaActuators 4.3WakeFlowCharacterizationwithPlasmaActuators 5.ResultsandAnalysis 5.1WakeFlowCharacteristicswithoutPlasmaActuators 5.2WakeFlowCharacteristicswithPlasmaActuators 5.3ComparisonandAnalysis 6.Discussion 6.1EffectivenessofPlasmaActuators 6.2MechanismofWakeFlowControl 6.3PracticalImplications 7.Conclusion 7.1SummaryofFindings 7.2ImplicationsforFutureResearch 1.Introduction 1.1Background Thewakeflowbehindacircularcylinderischaracterizedbycomplexvorticalstructures,highlevelsofturbulence,andthesheddingofvortices.Thesewakecharacteristicscanhavesignificanteffectsontheperformanceofobjectsplaceddownstream,suchasreducingaerodynamicefficiencyandincreasingdragforces.Therefore,thereisaneedforeffectiveflowcontroltechniquestomodifythewakeflowandimprovetheperformanceofvariousindustrialapplications,includingtransportation,energygeneration,andaerospace. 1.2Objectives Theprimaryobjectiveofthisstudy