Novel, shear stress-sensitive/temperature-insensitive liquid crystal coatings have been applied to the surface of an oscillating airfoil in order to ascertain the unsteady fluid physics associated with the dynamic-stall process. Surface microtufts and laser sheet/smoke-particle flow visualization were used to compare the liquid-crystal results. Boundary-layer transition and turbulent separation locations were measured as a function of geometric angle of attack. The results obtained are compared with Eppler (1980) aerodynamic design code predictions.


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    Title :

    Observations of dynamic stall phenomena using liquid crystal coatings


    Contributors:

    Published in:

    Publication date :

    1991-02-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English






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