The present study proposes a new configuration of an internally blown flap based on a multielement airfoil for the high-lift system of an amphibious aircraft. Triobjective optimization based on computational fluid dynamics is carried out. The optimization results show that the present configurations have efficient lift enhancement and reach the tradeoff of the lift to drag ratio and low angle-of-attack performance. The optimized configuration also has good stall behavior and better poststall performance. A parametric analysis is conducted to test the sensitivity of each design parameter, and the results prove the robustness of the configuration. The results of different jet momentum coefficients show that two critical values exist that separate the lift versus jet momentum curve into three segments corresponding to different flow phenomena, which indicates that the circulation control rule for a multielement airfoil with a blown flap is different and more complicated.


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    Title :

    Optimization and Analysis of a Blown Flap Based on a Multielement Airfoil


    Contributors:
    Yuhui, Yin (author) / Yufei, Zhang (author)

    Published in:

    Journal of Aircraft ; 57 , 1 ; 62-75


    Publication date :

    2020-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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