A multidisciplinary computational investigation has been conducted to examine the feasibility of controlling the buffet problem using different active flow control methods. Tangential central blowing (TCB), tangential vortex blowing (TVB), and tangential spanwise blowing (TSB) methods were used to inject high-momentum fluid into the vortical flow of generic fighter aircraft flying at 300 deg angle of attack. The effect of blowing strength on the buffet responses is also investigated. The injection is aimed to strengthen the wing vortices and to delay the onset of breakdown in order to alleviate the twin-tail buffet. The results indicated that blowing directly into the core of the leading-edge vortices has more potential in controlling the buffet responses and in the reformation of unburst vortices with larger length. The TVB method produced the most favorable results with a reduction of about 43 % in the buffet excitation parameter and a reduction of about 40 % in the amplitude of bending deflection. This multidisciplinary investigation is conducted using the multidisciplinary computing environment (MDICE).


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    Title :

    Active vortical flow control for alleviation of twin-tail buffet of generic fighter aircraft


    Additional title:

    Aktive Wirbelströmungsdämpfung zur Reduktion der Doppel-Heckrumpf-Strukturflatterschwingungen von Militär-Düsenjägern


    Contributors:

    Published in:

    Publication date :

    2001


    Size :

    21 Seiten, 19 Bilder, 32 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    ACTIVE VORTICAL FLOW CONTROL FOR ALLEVIATION OF TWIN-TAIL BUFFET OF GENERIC FIGHTER AIRCRAFT

    Sheta, E. F. / Harrand, V. J. / Huttsell, L. J. et al. | British Library Conference Proceedings | 2000


    Active vortical flow control for alleviation of twin-tail buffet of generic fighter aircraft

    Sheta, Essam / Harrand, Vincent / Huttsell, Lawrence | AIAA | 2000


    VORTEX CONTROL FOR TAIL BUFFET ALLEVIATION ON A TWIN-TAIL FIGHTER CONFIGURATION

    Puram, C. K. / Rao, Dhanvada M. / Shah, Gautam H. | SAE Technical Papers | 1989


    Effectiveness of Flow Control for Alleviation of Twin-Tail Buffet

    Sheta, Essam F. / Kandil, Osama A. / Yang, Zhi | SAE Technical Papers | 1998


    Effectiveness of flow control for alleviation of twin-tail buffet

    Sheta, Essam / Kandil, Osama / Yang, Zhi | AIAA | 1998