Aerodynamics and mechanisms of elementary morphing models for flapping wing in forward flight of bat-中国Betway体育网页登陆

摘要 Largeactivewingdeformationisasignificantwaytogeneratehighaerodynamicforcesrequiredinbat’sflappingflight.Besidesthetwisting,elementarymorphingmodelsofabatwingareproposed,includingwing-bendinginthespanwisedirection,wing-camberinginthechordwisedirection,andwingarea-changing.Aplateofaspectratio3isusedtomodelabatwing,andathree-dimensionalunsteadypanelmethodisusedtopredicttheaerodynamicforces.Itisfoundthatthecamberingmodelhasgreatpositiveinfluenceonthelift,followedbythearea-changingmodelandthenthebendingmodel.Furtherstudyindicatesthatthevortexcontrolisamainmechanismtoproducehighaerodynamicforces.Themechanismsofaerodynamicforceenhancementareasymmetryofthecamberedwingandamplificationeffectsofwingarea-changingandwingbending.Liftandthrustaregeneratedmainlyduringdownstroke,andtheyarealmostnegligibleduringupstrokebytheintegratedmorphingmodel-wing.

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Aerodynamics and mechanisms of elementary morphing models for flapping wing in forward flight of bat

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