An experimental study of the aerodynamics of a dragonfly in hovering flight is conducted. Measurements are made on a mechanical flapping wing apparatus that simulates, in water, the Reynolds number and reduced frequency or the tandem wing configuration on a dragonfly. The length scale of the flapping wing model is four times larger than on a real dragonfly. The phase difference between the flapping motions of the fore- and hindwings is independently varied in the range 0-90 deg to examine the flow interaction between the wings when the dragonfly is in hovering flight. The time histories and time average values of the fluid dynamic forces and the rate of work show that, in hovering flight, there is only a small interaction between the flows over the fore- and hindwings. The experimental data are also compared with the predictions of a three-dimensional Navier-Stokes code; these comparisons show good agreement and, thus, also verify the fidelity of the experimental data.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Measurement of unsteady fluid dynamic forces for a mechanical dragonfly model


    Additional title:

    Messung der instationären hydrodynamischen Kräfte auf das biomechanische Modell zweier Insektenflügel


    Contributors:

    Published in:

    AIAA Journal ; 43 , 12 ; 2475-2480


    Publication date :

    2005


    Size :

    6 Seiten, 14 Bilder, 1 Tabelle, 23 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English