Adaptive active flow control for twin-tail buffet alleviation is investigated. The concept behind this technique is to place control ports on the tail outer and inner surfaces with flow suction or blowing applied through these ports in order to minimize the pressure difference across the tail. The suction or blowing volume flow rate from each port is proportional to the pressure difference across the tail at this location. A parametric study of the effects of the number and location of these ports on the buffet response is carried out. The computational model consists of a sharp-edged delta wing of aspect ratio one and swept-back flexible twin tail with taper ratio of 0.23. This complex multidisciplinary problem is solved sequentially using three sets of equations for the fluid flow, aeroelastic response and grid deformation, using a dynamic multi-block grid structure. The computational model is pitched at 30 deg angle of attack. The freestream Mach number and Reynolds number are 0.3 and 1.25 million, respectively. The model is investigated for the inboard position of the twin tails, which corresponds to a separation distance between the twin tails of 33% of the wing span. Comparison of the time history and power spectral density responses of the tails for various distributions of the control ports are presented and discussed.


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    Title :

    Adaptive Suction and Blowing for Twin-Tail Buffet Control


    Contributors:


    Publication date :

    1999-06-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    Adaptive Suction and Blowing for Twin-Tail Buffet Control

    Kandil, O. A. / Yang, Z. / Confederation of European Aerospace Societies et al. | British Library Conference Proceedings | 1999




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