An aerodynamic shape optimization technique has been developed for helicopter rotor blades in hover based on a continuous adjoint method on unstructured meshes. For this purpose, the Euler flow solver and the adjoint sensitivity analysis were formulated on the rotating frame of reference. To handle the repeated evaluation of the flow solution and the sensitivity analysis efficiently, the flow and adjoint solvers were parallelized using a domain decomposition strategy. A solution-adaptive mesh refinement technique was adopted to better resolve the tip vortex. Applications were made to the aerodynamic shape optimization of the Caradonna-Tung rotor blade and the UH-60 rotor blade. The results showed that the present method is effective in determining optimum aerodynamic configurations of rotor blades in hover, which require minimum inviscid torque while maintaining the desired thrust level at transonic flight conditions.


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    Title :

    Aerodynamic shape optimization of hovering rotor blades in transonic flow using unstructured meshes


    Additional title:

    Aerodynamische Optimierung transsonisch umströmter Rotorblätter unter Verwendung unstrukturierter Gitter


    Contributors:

    Published in:

    AIAA Journal (online) ; 44 , 8 ; 1816-1825


    Publication date :

    2006


    Size :

    10 Seiten, 16 Bilder, 19 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English






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