Different lift decompositions into the elemental terms are compared based on direct numerical simulations of a flapping flat plate and a flapping rectangular wing at low-Reynolds-number flows. The simple lift formula is given as a useful approximate form that has the vortex force and local acceleration terms. The accuracy of the simple lift formula in lift estimation is quantitatively evaluated in comparison with the general force formulas based on the fully resolved two- and three-dimensional unsteady velocity fields and the planar velocity fields at several spanwise locations in simulated particle-image-velocimetry measurements. In addition, the mathematical connections between the different force formulas are discussed.


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    Title :

    Evaluation of Lift Formulas Applied to Low-Reynolds-Number Unsteady Flows


    Contributors:
    Wang, Shizhao (author) / Zhang, Xing (author) / He, Guowei (author) / Liu, Tianshu (author)

    Published in:

    AIAA Journal ; 53 , 1 ; 161-175


    Publication date :

    2015-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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