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Numerical Simulations of NS-DBD Plasma Actuators for Flow Control PDF

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Delft University of Technology Numerical Simulations of NS-DBD Plasma Actuators For Flow Control Popov, Ilya DOI 10.4233/uuid:f2fa6bd6-4419-494c-ab14-f0c1ec020270 Publication date 2016 Document Version Final published version Citation (APA) Popov, I. (2016). Numerical Simulations of NS-DBD Plasma Actuators For Flow Control. https://doi.org/10.4233/uuid:f2fa6bd6-4419-494c-ab14-f0c1ec020270 Important note To cite this publication, please use the final published version (if applicable). Please check the document version above. Copyright Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons. Takedown policy Please contact us and provide details if you believe this document breaches copyrights. We will remove access to the work immediately and investigate your claim. This work is downloaded from Delft University of Technology. For technical reasons the number of authors shown on this cover page is limited to a maximum of 10. NUMERICAL SIMULATIONS OF NS-DBD PLASMA ACTUATORS FOR FLOW CONTROL NUMERICAL SIMULATIONS OF NS-DBD PLASMA ACTUATORS FOR FLOW CONTROL Proefschrift terverkrijgingvandegraadvandoctor aandeTechnischeUniversiteitDelft, opgezagvandeRectorMagnificusprof.ir.K.C.A.M.Luyben, voorzittervanhetCollegevoorPromoties, inhetopenbaarteverdedigenop22Maart2016om15:00uur door Ilya POPOV MasterofAppliedPhysicsandMathematics MoscowInstituteofPhysicsandTechnology geborenteMoskou,Rusland. Ditproefschriftisgoedgekeurddoorde promotor: Prof.dr.F.Scarano copromotor: Dr.S.J.Hulshoff Samenstellingpromotiecommissie: RectorMagnificus, voorzitter Prof.dr.F.Scarano, TechnischeUniversiteitDelft,LR,promotor Dr.S.J.Hulshoff, TechnischeUniversiteitDelft,UD-LR,copromotor Onafhankelijkeleden: Prof.dr.U.Ebert, CWIAmsterdam Prof.J-P.Boeuf, CNRSU.PaulSabatier Prof.dr.ir.L.L.M.Veldhuis, TechnischeUniversiteitDelft,LR Prof.dr.ir.G.A.M.vanKuik, TechnischeUniversiteitDelft,LR,reservelid DrA.Y.Starikovskiy, PrincetonUniversity,USA Overigeleden: Dr.M.Kotsonis, TechnischeUniversiteitDelft,UD-LR Keywords: flowcontrol,plasmaactuators,transition,separation Printedby: SiecaRepro Front&Back: ImagecreatedbyJ.O’Sullivan.CC-BYlicense. Copyright©2015byIlyaPopov CreativeCommonsAttribution-ShareAlike4.0InternationalLicense ISBN978-94-6186-617-2 Anelectronicversionofthisdissertationisavailableat http://repository.tudelft.nl/. v Inmemoryofmyfather Contents Contents vii Summary xi Samenvatting xiii Nomenclature xv 1 Introduction 1 2 Flowcontrol 7 2.1 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 Flowcontrolexamples . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3 Plasmaflowcontrol . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.4 Plasmaactuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.4.1 AC-DBDplasmaactuators . . . . . . . . . . . . . . . . . . . . . . 15 2.4.2 NS-DBDplasmaactuators . . . . . . . . . . . . . . . . . . . . . . 16 2.5 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 3 NS-DBDplasmaactuators 23 3.1 Thephysicsofplasma . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 3.2 Thephysicsofdischarges . . . . . . . . . . . . . . . . . . . . . . . . . 27 3.3 ThelayoutofNS-DBDactuators . . . . . . . . . . . . . . . . . . . . . . 29 3.4 Operatingparameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 3.5 Electricalmeasurements . . . . . . . . . . . . . . . . . . . . . . . . . . 34 3.5.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 3.5.2 Experimentalsetup . . . . . . . . . . . . . . . . . . . . . . . . . 36 3.5.3 Lowvoltagemeasurements . . . . . . . . . . . . . . . . . . . . . 37 3.5.4 Highvoltagemeasurements. . . . . . . . . . . . . . . . . . . . . 39 3.5.5 Energyperpulse . . . . . . . . . . . . . . . . . . . . . . . . . . 48 3.5.6 Conclusionsfromtheexperiments . . . . . . . . . . . . . . . . . 50 vii viii CONTENTS 4 NS-DBDactuatormodeling 51 4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 4.2 NS-DBDeffectsandmodelassumptions . . . . . . . . . . . . . . . . . 52 4.2.1 Compressibleandthermodynamiceffects . . . . . . . . . . . . . 52 4.2.2 Momentumdeposition . . . . . . . . . . . . . . . . . . . . . . . 55 4.2.3 Spanwiseuniformityoftheactuatoreffects . . . . . . . . . . . . . 56 4.2.4 Temporalproperties. . . . . . . . . . . . . . . . . . . . . . . . . 58 4.2.5 Proposedmodel . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 4.2.6 Numericalimplementationaspects . . . . . . . . . . . . . . . . . 60 5 Actuatorinalaminarboundarylayer 63 5.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 5.2 Simulationsetup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 5.2.1 Simulationdomain . . . . . . . . . . . . . . . . . . . . . . . . . 64 5.2.2 Actuatormodel . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 5.3 Comparisontoexperimentalmeasurements. . . . . . . . . . . . . . . 65 5.4 Comparisontolinearstabilitytheory . . . . . . . . . . . . . . . . . . . 66 5.4.1 Linearizationerror. . . . . . . . . . . . . . . . . . . . . . . . . . 71 5.4.2 Parallelflowassumption . . . . . . . . . . . . . . . . . . . . . . 72 5.4.3 ThedifferencebetweenthePODandLSTanalysis . . . . . . . . . 72 5.4.4 Numericalerrorsofthesimulation . . . . . . . . . . . . . . . . . 75 5.5 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 6 Actuatorinafreeshearlayer 79 6.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 6.2 Actuatormodel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 6.3 Simulationdescription . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 6.4 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 6.4.1 Acousticwave . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 6.4.2 Velocityoscillationsandvortexstructure . . . . . . . . . . . . . . 82 6.4.3 Entropyspot. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 6.4.4 Flowstatistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 6.4.5 Comparisonwithlinearstabilitytheory . . . . . . . . . . . . . . . 88 6.4.6 Effectofvaryingenergyinput . . . . . . . . . . . . . . . . . . . . 94 6.4.7 Meshconvergence . . . . . . . . . . . . . . . . . . . . . . . . . . 94 6.5 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 7 Conclusionsandoutlook 99 7.1 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 7.2 Outlook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 CONTENTS ix A NS-DBDplasmaactuatorsonairfoils 103 A.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 A.2 Setupandmeshing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 A.2.1 Boundaryconditions . . . . . . . . . . . . . . . . . . . . . . . . 104 A.2.2 Turbulencemodel . . . . . . . . . . . . . . . . . . . . . . . . . . 106 A.3 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 A.4 Analysisandconclusions . . . . . . . . . . . . . . . . . . . . . . . . . . 107 B Properorthogonaldecomposition 111 B.1 Algorithmdescription . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 B.1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 B.1.2 ConstructionofPODbasis . . . . . . . . . . . . . . . . . . . . . . 112 B.1.3 ProjectionoftheN-Sequations . . . . . . . . . . . . . . . . . . . 114 B.1.4 Flowrateconservation . . . . . . . . . . . . . . . . . . . . . . . 114 B.1.5 SGSmodel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 B.1.6 Weighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 B.2 Validation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 B.2.1 Laminarvortexshedding . . . . . . . . . . . . . . . . . . . . . . 116 B.2.2 Freeshearlayer . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 C Linearstabilitytheory 127 C.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 C.2 Temporalstability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 C.3 Spatialstability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129 C.4 Validation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 C.5 Implementationdetails . . . . . . . . . . . . . . . . . . . . . . . . . . 132 Index 133 Bibliography 135 Listofpublications 145 Acknowledgements 149 CurriculumVitæ 151

Description:
flow control, plasma actuators, transition, separation .. For the purposes of simulations of fluid-dynamic effects of the actuation, .. ionization (electric breakdown) and the energy is spent heating the electrodes. In . DBD actuator induced gas velocities have near-zero values for nanosecond pulse
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