The wake vortex hazard problem continues to be a limiting factor for increasing airport capacity. The strong and persistent wake vortices generated by aircraft during takeoff and landing can pose a serious threat to following aircraft, thus, airports are forced to adhere to strict spacing rules that severely limit the frequency with which aircraft can use their runways. Numerous attempts have been made to solve this problem, but unfortunately, no clear solution that is both practical and implementable has been found. In this work, the authors examine the potential for using a spanwise actuating Gurney flap for active wake alleviation. The authors designed this device specifically for wake alleviation, and it is unique in that the control surface moves in the spanwise direction.The spanwise actuating Gurney flap constitutes a simple, practical, and implementable device capable of perturbing a trailing vortex in a manner that may excite wake instability. Although dynamic effects were not examined here, results from other Gurney flap-type devices suggest that at the slow actuation speeds that would be necessary to excite long wavelength instabilities, the response will likely be quasi steady. More work will be required to determine the optimal shape and configuration for such a device as well as the best way to implement it on a multi-element high lift wing.


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    Title :

    Novel aerodynamic device for wake vortex alleviation


    Additional title:

    Neues aerodynamisches Gerät zur Reduzierung der Wirbelschleppe


    Contributors:

    Published in:

    AIAA Journal (online) ; 45 , 9 ; 2348-2350


    Publication date :

    2007


    Size :

    3 Seiten, 5 Bilder, 8 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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