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《涵道螺旋槳兩棲飛行器的格柵翼氣動(dòng)特性分析》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、涵道螺旋槳兩棲飛行器的格柵翼氣動(dòng)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
