Two methods for modeling dynamic stall have been developed. The alpha, A, B method generates lift and pitching moments as functions of angle of attack and its first two time derivatives. The coefficients are derived from experimental data for oscillating airfoils. The Time Delay Method generates the coefficients from steady state airfoil characteristics and an associated time delay in stall beyond the steady state stall angle. Correlation with three types of test data shows that the alpha, A, B method is somewhat better for use in predicting helicopter rotor response in forward flight. Correlation with lift and moment hysteresis loops generated for oscillating airfoils was good for both models.


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    Title :

    Dynamic stall modeling and correlation with experimental data on airfoils and rotors


    Contributors:


    Publication date :

    1974-01-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English


    Keywords :


    Dynamic stall modeling and correlation with experimental data on airfoils and rotors

    Carlson, R. / Blackwell, R. / Commerford, G. | Tema Archive | 1974



    Dynamic Stall Experiments on Oscillating Airfoils

    W.J. McCroskey / L.W. Carr / K.W. McAlister | AIAA | 1976


    Dynamic stall experimenmts on oscillating airfoils

    McCroskey, W. / Carr, L. / McAlister, K. | Tema Archive | 1976


    Dynamic stall experiments on oscillating airfoils

    MCCROSKEY, W. / CARR, L. / MCALISTER, K. | AIAA | 1975