The experimental investigations of this paper show that delta- and reverse-delta-shaped small horizontal strakes (fineness ratio of 3–5%) are capable of suppressing the wing rock of a slender delta wing above 35 deg angle of attack. The parametric study reveals that 45 deg sweepback and sweepforward angles are the most favorable combinations, while the most advantageous streamwise location of the strake is the beginning of the delta wing. The suppression capability is also evident during pitching up, but no significant deterioration of the lift-to-drag ratio is observed. The suppression is achieved by changes in the vortical flowfield brought in by the strakes. During a roll, the strake 1) alters the away normal and outward spatial location of the up-going semispan’s vortex to closer normal and inward spatial location, respectively, and 2) reduces the difference in the normal distances of vortices of two semispans, both of which are the characteristics of no-wing-rock regime, such as 15 deg angle of attack. Thus, the strake changes the asymmetric flow to nearly symmetric. Such change in the vortical flowfield is caused by the interaction of two vortices emanating from the strake, with the vortex pair originating from the delta wing.


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    Titel :

    Suppression of Wing Rock in Slender Delta Wing by Horizontal Strakes


    Beteiligte:
    Bakaul, Saifur R. (Autor:in) / Yankui, Wang (Autor:in) / Guangxing, Wu (Autor:in)

    Erschienen in:

    AIAA Journal ; 52 , 12 ; 2739-2750


    Erscheinungsdatum :

    2014-05-12


    Format / Umfang :

    12 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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    Bakaul, Saifur R. / Wang, Yankui / Guangxing, Wu | AIAA | 2015


    Suppression of Wing Rock in Slender Delta Wing by Horizontal Strakes (AIAA 2015-0746)

    Bakaul, Saifur R. / Wang, Yankui / Guangxing, Wu | British Library Conference Proceedings | 2015


    Effect of Vertical Strakes on Suppression of Wing Rock in Slender Delta Wing

    Bakaul, Saifur R. / Wang, Yankui / Guangxing, Wu | AIAA | 2015


    Effect of Vertical Strakes on Suppression of Wing Rock in Slender Delta Wing (AIAA 2015-1039)

    Bakaul, Saifur R. / Wang, Yankui / Wu, Guangxing | British Library Conference Proceedings | 2015