飞机总体方案设计例子.doc

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1、TeamV;108=PreliminaryDesignReviewAAE451AircraftDesignFinalReportTeamV27April,2006StephenBeirneCharlieRushMilesHatemZhengWangChrisKesterBrandonWeddeJimRadtkeGregWilsonTeamV;108TeamV;108ExecutiveSummaryTheBarnOwlisTeamV’ssolutiontotheneedforanalternativef

2、uelaircraftwithinthesingleenginegeneralaviationmarket.Thisneedwillariseaspeak-oilapproachesandpetroleum-basedfuelsbecomescarceandexpensive.TheBarnOwlhasalsobeendesignedwiththenear-termneedforareplacementfor100octanelow-leadaviationgasolineinmind.100low-

3、leadisexpectedtobephasedoutinthenext10years.Thevalueofthisnear-termmarkethasbeenestimatedatover$1billionannuallyonce100low-leaddisappears.PreviousworkbyTeamVhasfocusedondefiningrequirementsfortheBarnOwlanddevelopingtheaircraftconcept.InthisPreliminaryDe

4、signReview,thefeasibilityoftheBarnOwlisdemonstratedbydetailedanalysisoftheconceptanditsfeatures.Aweightfraction-basedsizingcodewasusedtoproduceconstrainedcarpetplots.Alight-weightdesignwasselectedfromthefeasiblespace,andusedforfurtherdetaileddesign.This

5、sizingapproachwascontinuallyupdatedasthedetailedanalyseswererefined.Detailedaerodynamicanalysisconsistedofseveralcoordinatedefforts.Theairfoilcross-sectionwasdesignedusingageneticalgorithm.Thewingplanformwasoptimizedtohaveanellipticalliftdistributionatt

6、hecruisecondition.Athree-dimensionalCMARCanalysisprovideddetailedaerodynamicperformancepredictions.Theteamdevelopedastructurallayoutandselectedmaterialsbasedoncostconsiderations.Detailedstructuralanalysiswascarriedout,optimizingthewingstructureandconfir

7、mingtheviabilityofthefuselagestructurallayout.ComponentweightsweredeterminedandusedincalculatingthestaticlongitudinalstabilityoftheBarnOwl.Theteamsucceededindemonstratingreasonablestability.Stall-spinstabilitywasalsoconsideredandassured.Forpropulsion,an

8、existingdieselengineandexistingpropellerwereselected.Theuseofthisoff-the-shelftechnologywillreducethecostofdevelopmentandeasemanufacturing.TheBarnOwlisprojectedtocost$278,700.ThispriceandtheBarnOwl’ssolidperformancewillmakeitacom