涵道螺旋桨两栖飞行器的格栅翼气动特性分析

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1、涵道螺旋桨两栖飞行器的格栅翼气动特性研究AbstractDuetedpropeller15acomPaetandinnovativeliftsystemforvertiealtakeoffandlanding(VTOL)aircraft.ModernduetedProPelleraircraftrequesteompaetlayout，highforwardflightsPeed，maneuverabilityandlownoiselevel，whiehresultinmoreseriousaerodynamieissues.ComParingwiththefixedwi

2、ng，duetedProPellerflowfieldsaremoreeomPlex，includemainlythefollowingeharacteristics.Firstly，theflowfieldsaretyPieallyunsteady，undertheforwardflighteondition，theairflowsPeedrelativetothebladesoftheadvaneingsideinereases，followingPhenomenonsoftransoniesPeedsuehasshoekwave，ontheotherside，the

3、relativesPeeddeereases，theflowangle15eomParativelyhigh，usuallyleadtodynamiestall;Secondly，theduetProPellerProdueesintensetiPvortex，whiehhoveraroundtheProPeller，andmakeastrongimPaetontheaerodynamiceharaeteristiesofflightaireraft.Afterdozensofyears’develoPment，eomPutationalfluiddynamieshasr

4、eeeivedPraeticalaPPlicationinaviation，asaresultofthementionedeomPlexityaerodynamicsabove，itsaPPlieationtoduetProPeller15muehlessthanfixedwings.AlongwiththeeomPutertechnologydeveloPment，it’5Possiblenowtoresolvethethreedimensionaltime一dePendentN一5equationsforcomPlexgeometry.Consideringviseo

5、sityeffeet，theN一5equationshavethePotentialtoaehieveaeeuratedeseriPtionoftheformationandtransPortationofvortex，whiehdon，tdePendonanywakemodel.DuetProPellerwakecanbeobtainedasaPartofsolution.TheeffeetsofgridfingeometryParametersontheaerodynamieperformanceofduetProPellerwerestudiedbymeansofe

6、omPutationalfluiddynamies.Firstly，thesimulationdataofliftforeesarevalidatedbytheexPeriment;secondlyundertheworkingeonditionofProPeller，thesimulationmodelswithdifferentehords，attackangles，webthieknessandloeationsoftheProPellerwereestablished.BasedontheanalysisofthesingleParameterinflueneeo

7、nduetProPeller，5aerodynamiePerformanee，weusethedesignoftestingmethodtoestablishtheaPProximationmodel;Finally，aProPeroPtimizationstrategywasusedtoobtainthemaximumliftforceoftheduetProPeller.Themethodabouthowtoehoosethegridfin’5geometryParametersthatsuitableforductPro