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Concept Design of Adaptive Wing with Flexible Trailing Edge

Yang Zhichun,Xie Jiang (School of Aeronautics,Northwestern Polytechnical University,Xi'an 710072,China)  
A concept design based on the rotating rib proposed by H.P.Monner is conducted to implement the variable camber adaptive wing concept by means of deforming the trailing edge flexibly with continued and smooth contour. A study is made of the kinematics of the rib structure,which can be simplified as a single degree of freedom (DOF) leverage system constrained by pivot joints. The pivot location optimization by curve approximation is proposed to design the flexible trailing edge to meet the design requirements. To test the feasibility of the proposed concept design method,a 2D wing model characterized by NACA63015A airfoil with 1 000 mm length in chordwise direction is utilized as a benchmark. The maximum deflection displacement of the tip point on the trailing edge as required by the design is 62 mm. Three types of cambered trailing edges with the same tip point deflection displacement but different deflection tracks,i.e.,the beam type,the arc of circle type,and the inverse beam type,are introduced. A comparative study is performed in terms of structure realization,load carrying capability,and aerodynamic performance. The result shows that the model configured with the arc of circle type trailing edge has the best performance and the design method is feasible and practical. It can be applied to any other design proposals of trailing edge deflection based on specific requirements.
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