Initial unsteady aerodynamic measurements of a circulation controlled airfoil and an oscillating flow wind tunnel.
Lancaster, Emmet John
Schmidt, Louis V.
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Steady state results of lift developed by varying the momentum blowing coefficient (C(ϻ)) upon a refurbished Circulation Control Rotor (CCR) airfoil section were favorable. This thesis was an experimental investigation to quantitatively evaluate whether the steady state results could be applied by a quasi-steady assumption when a harmonic perturbation of C(ϻ) was superimposed upon the steady value. Results suggested an attenuation in the dynamic transfer function of dC(p)/dC(ϻ) as the oscillating blowing frequency was increased.
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