The effects of upward ramp rate, actuation start time, and duration of a moveable trailing-edge flap on the critical aerodynamic values of an oscillating wing were investigated. The largest improvement in the peak negative pitching moment was obtained with a fast ramp rate and a start time near the mean angle. The largest value of net work coefficient, however, was generated with a delayed start time and a slower ramp rate. The peak lift coefficient decreased with increasing ramp rate and decreasing start time. The inclusion of a short steady-state portion in the flap motion was beneficial. An upward flap deflection initiated slightly after the mean angle during pitch-up, moved to its maximum deflection at a moderate speed, remained steady for a rather short period, and then returned to its initial position, which spanned half the oscillation cycle, was found to provide a best compromise between the various aerodynamic requirements.


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    Title :

    Trailing-edge flap control of dynamic pitching moment


    Additional title:

    Dynamische Nickmomentkontrolle von Rotorblättern durch Stellklappen


    Contributors:
    Gerontakos, P. (author) / Lee, T. (author)

    Published in:

    AIAA Journal (online) ; 45 , 7 ; 1688-1694


    Publication date :

    2007


    Size :

    7 Seiten, 5 Bilder, 1 Tabelle, 11 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English