Aerodynamic characteristics of morphing wing withflexible leading-edge

查看全文 作　　者：Zi [1]KAN;Daochun [1]LI;Tong [1]SHEN;Jinwu [1]XIANG;Lu [1]ZHANG

机构地区：[1]School of Aeronautic Science and Engineering,Beihang University,Beijing 100083,China

出　　处：《Chinese Journal of Aeronautics》索引2020年第33卷第10期,共10页

基　　金：the Beijing Advanced Discipline Center for Unmanned Aircraft System。 摘　　要：The morphing wing can improve the flight performance during different phases.However,research has been subject to limitations in aerodynamic characteristics of the morphing wing with a flexible leading-edge.The computational fluid dynamic method and dynamic mesh were used to simulate the continuous morphing of the flexible leading-edge.After comparing the steady aerodynamic characteristics of morphing and conventional wings,this study examined the unsteady aerodynamic characteristics of morphing wings with upward and downward deflections of the leading-edge at different frequencies.The numerical results show that for the steady aerodynamic,the leading-edge deflection mainly affects the stall characteristic.The downward deflection of the leading-edge increases the stall angle of attack and nose-down pitching moment.The results are opposite for the upward deflection.For the unsteady aerodynamic,at a small angle of attack,the transient lift coefficient of the upward deflection,growing with the increase of deflection frequency,is larger than that of the static case.The transient lift coefficient of the downward deflection,decreasing with the increase of deflection frequency,is smaller than that of the static case.However,at a large angle of attack,an opposite effect of deflection frequency on the transient lift coefficient was demonstrated.The transient lift coefficient is larger than that of the static case when the leading edge is in the nose-up stage,and lower than that of the static one in the nose-down stage. 关键词：AERODYNAMICS Computational fluid dynamics Flexible leading-edge Morphing wings Stall angle

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Aerodynamic characteristics of morphing wing withflexible leading-edge

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